Journal No. of references
Occasional Papers of the Bernice Pauahi Bishop Museum 3
Occasional Papers of the Boston Society of Natural History 1
Occasional Papers of the California Academy of Sciences 1
Occasional Papers of the Department of Life Sciences, University of the West Indies 1
Occasional Papers of the Museum of Zoology, University of Michigan 3
Occasional Papers of the National Museum of Southern Rhodesia 7
Occasional Papers of the National Museum of Southern Rhodesia. B. Natural Sciences 5
Occasional Papers. Biological Society of Nevada 1
Oecologia (Berlin) 25
Oesterreichische Revue 1
Offenbacher Vereins für Naturkunde. Bericht 1
Öfversigt af Finska Vetenskaps-Societetens Förhandlingar 1
Öfversigt af Kongliga Vetenskaps-Akademiens Förhandlingar. Stockholm 3
Ohio Journal of Science 6
Oikos 9
Opinions and Declarations rendered by the International Commission on Zoological Nomenclature 2
Opredeliteli Faune SSSR 1
Opuscula Entomologica 2
Opuscula Zoologica. München 1
Opuscules de l'Institut Scientifique de l'Indochine 1
Organisms Diversity & Evolution 6
Oriental Insects 7
Orsis 2
Orsis (Organismes i Sistemes) 26
Osaka Shokubutsu Boeki 1
Osmia 2
Österreichische Zoologische Zeitschrift 1
Overseas Development Natural Resources Institute Bulletin 1
Pacific Conservation Biology 2
Pacific Insects 5
Pacific Insects Monograph 3
Pacific Science 7
Pakistan Entomologist 1
Pakistan Entomologists –
Pakistan Journal of Zoology 1
Palaeobiodiversity and Palaeoenvironments 2
Palaeoentomology 5
Palaeogeography, Palaeoclimatology, Palaeoecology 1
Palaeontologia Electronica 1
Palaeontomology 1
Palaeoworld 1
Palaios 1
Paläontologische Zeitschrift 3
Paleobiology 1
Paleontological Journal 27
Paleontologicheskii Zhurnal 14
Pan-Pacific Entomologist 32
Papeis Avulsos de Zoologia 1
Papeis Avulsos de Zoologia (São Paulo) 22
Papers of the Peabody Museum of Archaeology and Ethnology, Harvard University 1
Papua New Guinea Journal of Agriculture, Forestry and Fisheries 1
Parki Narodowe i Rezerwaty Przyrody 3
Pedobiologia 2
PeerJ 13
Peking Natural History Bulletin 1
Pest Articles & News Summaries 1
Pfälzer Heimat 4
Pflanzenschutz Berichte 2
Phelsuma 1
Philippine Journal of Science 4
Philippine Journal of Science. Section D. General Biology, Ethnology and Anthropology 1
Philippine Journal of Systematic Biology 1
Philosophical Transactions of the Royal Society of London 1
Philosophical Transactions of the Royal Society of London. B. Biological Sciences 4
Physiological Entomology 8
Physiological Zoology 1
Physis 1
Physis (Buenos Aires) 14
Phytophylactica 2
Pilot Register of Zoology 29
Pilot Register of Zoology Card 1
PLoS Genetics 1
PLoS ONE 31
Poeyana. Instituto de Ecología y Sistemática, Academia de Ciencias de Cuba 4
Poeyana. Instituto de Zoología, Academia de Ciencias de Cuba 1
Polish Ecological Studies 1
Polish Journal of Entomology 6
Polskie Pismo Entomologiczne 15
Popular Science Monthly 2
Population Ecology 1
Posebna Izdanja. Srpska Akademija Nauka i Umetnosti 1
Prace Komisji Nauk Rolniczych i Komisji Nauk Lesnych 11
Prace Muzeum Ziemi 1
Prace Towarzystwa Przyjaciól Nauk w Wilnie. Wydzial Nauk Matematycznych i Przyrodniczych 3
Prairie Naturalist 4
Príroda (Brno) 7
Priroda (Moscow) 1
Problemi Attuali di Scienza e di Cultura 2
Proceedings and Transactions of the Rhodesia Scientific Association 1
Proceedings and Transactions of the South London Entomological and Natural History Society 1
Proceedings of the Academy of Natural Sciences of Philadelphia 19
Proceedings of the Acadian Entomological Society 1
Proceedings of the American Academy of Arts and Sciences 10
Proceedings of the American Philosophical Society 3
Proceedings of the Biological Society of Washington 3
Proceedings of the California Academy of Sciences 13
Proceedings of the Dorset Natural History and Archaeological Society 1
Proceedings of the Ecological Society of Australia 2
Proceedings of the Entomological Society of British Columbia 2
Proceedings of the Entomological Society of London 3