Oldroyd H., 1949: Diptera. Introduction, and keys to families. 4 pp.
 
DIP 7068
Oldroyd H., 1960: Diptera Asilidae. Mission zoologique de l’I.R.S.A.C. en Afrique orientale. (P. Basilewsky et N. Leleupt, 1957). XXIX. 5 pp.
 
DIP 7069
Oldroyd H., 1960: Some Tabanidae (Dipt.) from Madagascar. 6 pp. [M42]
 
DIP 7070
Oldroyd H., 1961: Ergebnisse der Deutschen Afghanistan-Expedition 1956 der Landessammlungen für Naturkunde Karlsruhe. 4 pp.
 
DIP 6881
Oldroyd H., 1963: The 3rd Danish Expedition to Central Asia. Zoological results 32. Asilidae (Insecta) from Afghanistan. 5 pp. [M42]
 
DIP 2473
Oldroyd H., 1966: Notes on Coenomyia Latreille (Diptera: Coenomyiidae). 10 Figs., 11 pp. [B18]
 
BTE 16953
Oldroyd H., 1966: Notes on Coenomyia Latreille (Diptera: Coenomyiidae). 10 Figs., 11 pp. [DIP 2473] [B18] [M15]
 
INS 748
Oldroyd H., 1966: The future of taxonomic entomology. 8 pp.
 
63626
Oldroyd H., 1968: New Therevidae from Argentina. 9 pp.
 
DIP 7071
Oldroyd H., 1972: Asilidae (Diptera) d’Espagne (Pyrénées et Montes Universales). 4 pp. [M42]
 
DIP 2479
Olejníček J., 1982: Příspěvek k poznání druhů rodu Medetera (Diptera, Dolichopodidae) v ČSSR. 3 pp. [ZCS 18041] [M40]
 
KLA 32129
Olejníček J., Barták M., 1996: Faunistic records from the Czech Republic – 41 Diptera: Dolichopodidae. 2 pp. [M50] Klapalekiana 32(1-2): 129-130.
 
EPR 28127
Olejníček J., Kozánek M., 1997: Systenus slovaki sp. nov. (Diptera, Dolichopodidae) from Korea. 3 pp. Entomological Problems 28(2): 127-129.
 
KLA 32200
Olejníček J., Mocek B., 1996: Faunistic records from the Czech Republic – 47. Diptera: Dolichpodidae. 1 pp. [M54] Klapalekiana 32(3-4): 200.
 
DIP 2485
Olejníček J., Rozkošný R., 1978: Some species of Dolichopodidae (Diptera) new to the fauna of Czechoslovakia. 9 pp.
 
ASC 47052
Olexa A., 1950: Vzácnější druhy brouků z východního Slovenska. 4 pp. [COL721] [B18] [M34] Acta Societatis entomologicae Cechosloveniae 47: 52-55.
 
BSM 05832
Olexa A., 1958: Abraeus roubali n. sp., (Col. Histeridae). 1 pp. [HIS 64] [M23] Bulletin de la Société entomologique de Mulhouse 11(3): 32-35.
 
REP 175
Olexa A., 1962: Über die Haltung des Bunten Zwergchamäleons Microsaurus pumilus Daud. 9 pp. (in German). [M52] Aquarien und Terrarien: 33-41.
 
19392
Olexa A., 1975: Reklassifikation der Gattung Dirhagus und verwandter Gattungen (Coleoptera – Eucnemidae). 10 pp. [M63]
 
BSM 07521
Olexa A., 1975: Sur la variabilité de Saprinus perrisi Marseul, 1871 (Col. Histeridae). 1 pp. (in French). [M52] Bulletin de la Société entomologique de Mulhouse 8: 21.
 
AEB 73416
Olexa A., 1976: Anophtaeletes rousi gen. n., sp. n. aus dem Kaukasus (Coleoptera, Histeridae). 4 pp. [HIS 65] [M19] [M46] Acta Entomologica Bohemoslovaca 73: 416-419.
 
ELA 390
Olexa A., 1976: Beschreibung des Männchens vom Dirhagus palmi Olexa (Coleoptera, Eucnemidae). 4 pp. [M42]
 
AEB 77252
Olexa A., 1980: Eine neue Gattung und Art der psammophilen Histeridae aus der Karakum-Wüste (Coleoptera). 6 pp. [HIS 66] [M19] Acta Entomologica Bohemoslovaca 77: 252-257.
 
AEB 79196
Olexa A., 1982: Atholus (Euatholus) khnzoriani sp. n. aus Armenien, nebst Bemerkungen zur Systematik und Bionomie der Histerini (Coleoptera: Histeridae). 11 pp. [14189] [B05] [B14] Acta Entomologica Bohemoslovaca
 
AEB 79037
Olexa A., 1982: Revision der palaärktischen Arten der Gattung Anapleus (Coleoptera: Histeridae). 9 pp. [M34] Acta Entomologica Bohemoslovaca 79: 37-45.
 
AEB 81377
Olexa A., 1984: Hypocacculus (Nessus) neftensis sp. n. (Coleoptera, Histeridae). 3 pp. [HIS 67] [M19] Acta Entomologica Bohemoslovaca 81: 377-379.
 
AEB 81113
Olexa A., 1984: Revision der Arten der Gattung Pholioxenus Reichardt (Coleoptera: Histeridae). 19 pp. [B14] Acta Entomologica Bohemoslovaca
 
AEB 84216
Olexa A., 1987: Atholus astragali sp. n. aus Armenien, UdSSR (Coleoptera, Histeridae). 6 pp. [HIS 68] [M19] Acta Entomologica Bohemoslovaca 84: 216-220.
 
AEB 85469
Olexa A., 1988: Atholus holzschuhi sp. n. aus Nordiran (Coleoptera, Histeridae). 4 pp. [HIS 69] [M19] Acta Entomologica Bohemoslovaca 85: 469-472.
 
AEB 86309
Olexa A., 1989: Eutriptus punctatostriatus sp. n. aus Nepal (Coleoptera, Histeridae). 2 pp. [M46] Acta entomologica Bohemoslovaca 86: 309-310.
 
AEB 87141
Olexa A., 1990: On the genus Philothis and related genera (Coleoptera, Histeridae). 15 pp. [B14] [M32] Acta Entomologica Bohemoslovaca 87: 141-155.
 
RCB 29045
Olexa A., 1992: Bemerkungen zu einigen Arten der Gattung Gnathoncus Jacq. du Val, 1858 (Insecta, Coleoptera: Histeridae). 6 pp. [HIS 172] [M24] Reichenbachia 29/8: 45-50.
 
HIS 173
Olexa A., 1992: Bemerkungen zur Taxonomie, Bionomie und Verbreitung einiger Histeriden-Arten (Insecta, Coleoptera: Histeridae). 5 pp. [M20]
 
FHA 01007
Olexa A., 1992: Neue Art der Gattung Saprinus (Coleoptera: Histeridae). 3 pp. [M09]
 
FHA 02027
Olexa A., 1994: Bemerkungen zur Systematik der Gattung Pholioxenus (Coleoptera: Histeridae). 5 pp. [M09]
 
AGR 52
Oliveira A. N., Oliveira L. A., Figueiredo A. F., 2003: Arbuscular mycorrhizal colonization and nutrient concentration of three cultivars of banana on a Central Amazonian Oxisol. 8 pp. Acta Amazonica 33(3): 345-352.
 
PSC 218
Oliveira E. C., Ferreira E. J. G., 2002: Occurence of eggs and larvae of migratory Characiformes fish in the Negro River, Amazonas State, Brazil. 6 pp. Acta Amazonica 32(1): 163-168.
 
78470
Oliveira P. S., : Ant-mimicry in some spiders from Brazil. 15 pp.
 
SPX 23117
Oliveira S. J. de, 2000: A new, non-marine species of the genus Thalassomya Schiner, 1856 (Insecta, Diptera, Chironomidae, Telmatogetoninae). 4 pp. Spixiana 23(2): 117-120.
 
78835
Olivier P. A. S., Theron P. D., 1998: The genus Eupodes Koch (Acari: Prostigmata: Eupodidae) from southern Africa with a redescription of E. parafusifer Meyer & Ryke and descriptions of two new species. 14 pp. African Entomology 6(2): 275-288.
 
HYM 2867
Olmi M., 1975: Paradryinus afer sp. n. primo Driinide parassita degli Omotteri Fulgoroidei Ricaniidi del genere Ricania Germ. (Hymenoptera, Dryinidae). 6 pp.
 
SPX 21053
Olmi M., 1998: Taxonomic remarks on Australian Dryinidae with description of new species (Insecta, Hymenoptera, Chrysidoidea). 6 pp. Spixiana 21(1): 53-58.
 
SPX 27147
Olmi M., 2004: New species of Dryinidae from Colombia (Insecta, Hymenoptera, Chrysidoidea). 8 pp. Spixiana 27(2): 147-154.
 
SPX 28271
Olmi M., 2005: A contribution to the knowledge of Dryinidae of the Neotropical and Australian regions (Insecta, Hymenoptera, Chrysidoidea). 10 pp. Spixiana 28(3): 271-280.
 
SPX 31215
Olmi M., 2008: New species of Dryinidae from the Afrotropical Region (Insecta, Hymenotpera, Chrysidoidea). 7 pp. Spixiana 31(2): 215-221.
 
51701
Olmi M., Currado I., 1975: Su alcuni tipi di Dryinidae di Ljungh, Snellen van Vollenhoven a Klug (Bethyloidea). 20 pp.
 
BIO 146
Olson C. A., 1994: Floyd Gerald Werner 1921-1992. 12 pp. (in English). Psyche 101(1-2): 1-12.
 
AVE 166
Olson S. L., Violani C., 1995: Some unusual hybrids of Ramphocelus, with remarks on evolution in the genus (Aves: Thraupinae). 16 pp.
 
ASC 61284
Olsufiev N. G., Moucha J., Chvála M., 1964: Chrysozona scutellata sp. n. aus Mitteleuropa (Diptera, Tabanidae). 3 pp. [DIP 2493] Acta Societatis entomologicae Cechosloveniae 61: 284-286.
 
GEN 02337
Olszanowski Z., 1991: New mites of Holonothrus from Tasmania (Oribatida: Crotoniidae). 12 pp. [ARA 350] [M25] Genus.