P. Boddaert, med. doct. urbis Ulissingæ exconsiliarii ... Elenchus animalium, volumen I : sistens quadrupedia huc usque nota, eorumque varietates : ad ductum naturae, quantum fieri potuit disposita - Boddaert, Pieter, 1730 -1795 (Apud C.R. Hake, 1784)

P.A. Latreille scientiarum et artium instituti Gallici ... Genera crustaceorum et insectorum : secundum ordinem naturalem in familias disposita, iconibus exemplisque plurimis explicata - Latreille, P. A. (Pierre André), 1762 -1833 (Apud Amand Knig, Bibliopolam, 1809)

Palaeoniscus obtusus, ein Isopode aus der Braunkohle von Sieblos - Meyer, Hermann von, 1801 -1869 (Ebner & Seuber, 1858)

Palaeontographica (Theodor Fischer, 1855)

Palaeontographica (Theodor Fischer, 1861)

Palaeontographica (Theodor Fischer, 1867)

Palaozoologie : Entwurf einer systematischen Darstellung der Fauna der Vorwelt - Giebel, C. (Christoph), 1820 -1881 (Nulandt'sche buchandlung (L. Garcke), 1846)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1882)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1947)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1968)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1976)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1977)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1978)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1980)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1981)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1982)

Papéis avulsos do Departamento de Zoologia - São Paulo Departamento de Zoologia (A Secretaria, 1942)

Papéis avulsos do Departamento de Zoologia - São Paulo Departamento de Zoologia (A Secretaria, 1945)

Papers on bird protection - Royal Society for the Protection of Birds (1890)

Papers on Diptera - Hendel, Friedrich, 1874 -1936 (Smithsonian Institution, 1800)

Papers on Tipulidae - Alexander, Charles P. (Charles Paul), 1889 -1981 (s.n.], 1912)

Papers on Tipulidae - Alexander, Charles P. (Charles Paul), 1889 -1981 (s.n.], 1914)

Papers on Tipulidae - Alexander, Charles P. (Charles Paul), 1889 -1981 (s.n.], 1913)

Papers on Tipulidae - Alexander, Charles P. (Charles Paul), 1889 -1981 (s.n.], 1911)

Papers on Tipulidae - Alexander, Charles P. (Charles Paul), 1889 -1981 (s.n.], 1915)

Papers on Tipulidae - Alexander, Charles P. (Charles Paul), 1889 -1981 (s.n.], 1916)

Papers on Tipulidae - Alexander, Charles P. (Charles Paul), 1889 -1981 (s.n.], 1917)

The parasites of man, and the diseases which proceed from them; a textbook for students and practitioners - Leuckart, Rudolf, 1823 -1898 (Pentland, 1886)

Parasitology - British Society for Parasitology. (Cambridge University Press, 1912)

Parasitology - British Society for Parasitology. (Cambridge University Press, 1913)

Parasitology (Cambridge University Press, 1920)

Paxton's magazine of botany, and register of flowering plants - Paxton, Joseph, Sir, 1803 -1865 (Orr and Smith [etc.], 1834)

Pennsylvania farm journal - Darlington, J. L. (A.M. Spangler, 1853)

Perú : Yaguas-Cotuhé - Field Museum of Natural History. (Field Museum, Environment, Culture, and Conservation, 2011)

Pesticides documentation bulletin - National Agricultural Library (U.S.) (National Agricultural Library, U.S. Dept. of Agriculture, #c 1965-1969, 1965)