Our migrant birds and how to know them - Elms, E. F. M. (Thornton Butterworth, 1922)

Oxford gardens, based upon Daubeny's Popular guide to the physick garden of Oxford: with notes on the gardens of the colleges and on the University park - Gunther, R. T. (Robert Theodore), 1869 -1940 (Parker & son; [etc., etc.], 1912)

Oxford gardens. Based upon Daubeny's Popular guide to the physick garden of Oxford : with notes on the gardens of the colleges and on the University Park - Gunther, R. T. (Robert Theodore), 1869 -1940 (Parker, 1912)

Los pájaros insectívoros, bajo el punto de vista agricola - Lemée, Cárlos. (J. Sesé, 1909)

Pacific science - University of Hawaii. (University Press of Hawaii, 1947)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : skeletons numeric list (1966)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt specimens (5480 to 6070), 1968, PMS laboratory forms - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1968)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt specimens (SI-001 to SI-429), 1967 - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1967)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Israel banding information (A-10730 to A-16286), Fall 1968, PMS banding forms - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1968)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Israel banding information (A-1101 to A-1200, A-3001 to A-5000, A-5401 to A-5800), 1967-1968, PMS banding forms - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1967)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt specimens (4008 to 4933), 1968 - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1968)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt banding information (Dead on arrival / release), Fall 1971, PMS banding forms - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1971)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt specimens (4934 to 5479), 1968 - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1968)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Israel banding information (A-8657 to A-10729), 1968, PMS banding forms - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1968)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Israel banding information (B-4928 to B-5204; C-2355 to C-2465; D-2039 to D-2081; E-2263 to E-2273; H-1251 to H-1260; J-1251; HK-62824), Spring 1969, PMS banding forms - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1969)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt specimens (4001 to 4406), 1967 - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1967)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt banding information (DOA/Release), Spring-Fall 1970, PMS banding forms - Granger, J. S. (1970)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt banding information (010-20927 to 010-22885), Fall 1972, PMS banding forms - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1972)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1916)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1918)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1886)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1898)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1900)

The passerine birds of Ceylon - Wait, W. E. (Walter Ernest), 1878 - (s.n, 1922)

Per una classificazione elementare dei Passercei, Rampicanti e Trogoni, raccolta e ordinamento di alcuni caratteri - Cavazza, Filippo. (Tipografia di Paolo Neri, 1909)

Pfarrer P. Blasius Hanf als Ornitholog. Dargestellt vorzüglich auf Grundlage der Schriften desselben - Schaffer, Alexander. (Im Selbstverlag der Benediktiner-Abtei, 1904)

Die Pflanzenwelt Afrikas, insbesondere seiner tropischen Gebiete : Grundzge der Pflanzenverbreitung im Afrika und die Charakterpflanzen Afrikas - Engler, Adolf, 1844 -1930 (W. Engelman, 1910)

Die Pflanzenwelt Deutschlands; Lehrbuch der Formations- biologie. Eine Darstellung der Lebensgeschichte der wildwachsenden Pflanzenvereine und der Kulturflächen - Graebner, Paul, 1871 -1933 (Quelle & Meyer, 1909)

Die Pflanzenwelt Ost-Afrikas und der Nachbargebiete - Engler, Adolf, 1844 -1930 (D. Reimer, 1895)

Philippine birds - Du Pont, John E. (John Eleuthère), 1938 -2010 ([Delaware Museum of Natural History], 1971)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1907)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1911)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1912)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1906)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1921)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1986)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1989)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1992)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1995)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1997)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1998)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1999)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2003)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2004)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2006)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2007)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2009)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2013)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1965)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1983)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1994)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1995)

Plantae Laurentianae ou Énumération des plantes récoltées au Congo en 1893 et 1895-1896 par Émile Laurent - Laurent, Emile, 1861 -1904 (1903)

Plantarum vascularium genera :secundum ordines naturales digesta eorumque differentiae et affinitates tabulis diagnostacis expositae - Weidmann. (Libraria Weidmannia, 1836)

Plants of the Punjab : a descriptive key to the flora of the Punjab, North-west Frontier Province, and Kashmir - Bamber, Charles James, 1855 - (Supt. Govt. Printing, Punjab, 1916)

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A pocket-book of British birds - Elms, E. F. M. (West, Newman & co. [etc.], 1906)

A pocket botanical dictionary; comprising the names, history, and culture of all plants known in Britain; with a full explanation of technical terms - Lindley, John, 1799 -1865 (J. Andrews, 1840)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1968)

Practical bird-keeping : being reprints of articles which have appeared in The avicultural magazine, January, 1911-December, 1912 - Bonhote, J. Lewis (John Lewis), 1875 -1922 (West, Newman & Co, 1913)

A practical handbook of British birds - Witherby, H. F. (Harry Forbes), 1873 -1944 (Witherby, 1920)

A practical handbook of British birds - Witherby, H. F. (Harry Forbes), 1873 -1944 (Witherby, 1919)

A practical handbook of British birds - Witherby, H. F. (Harry Forbes), 1873 -1944 (Witherby, 1924)

Preliminary report on the forest and other vegetation of Pegu - Kurz, Sulpice (C.B. Lewis, Baptist Mission Press, 1875)

Primo resoconto dei risultati della inchiesta ornitologica in Italia ... - Giglioli, Enrico Hillyer, 1845 -1909 (Coi tipi dei successori Le Monnier, 1889)