Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1904)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1916)

Ornithologisches Centralblatt (1880)

Ornithologisches Centralblatt (L.A. Kittler, 1876)

Ornithologisches Centralblatt (L.A. Kittler, 1879)

Ornithologisches Centralblatt (1882)

Ornithologisches Jahrbuch (V. Tschusi, 1890)

Ornithologisches Jahrbuch (V. Tschusi, 1896)

Ornithologisches Jahrbuch (V. Tschusi, 1898)

Ornithologisches Jahrbuch (V. Tschusi, 1901)

Ornithologisches Jahrbuch (V. Tschusi, 1902)

Ornithologisches Jahrbuch (V. Tschusi, 1906)

Ornithologisches Jahrbuch (V. Tschusi, 1910)

Ornithologiske Bidrag til Faerøernes Favna - Holm, Peter Alberg. (1848)

The Ornithologist; a magazine of ornithology and oölogy. First series - Swann, H. Kirke (Harry Kirke), 1871 -1926 (John Bale & Sons, 1896)

The Ornithologist and oölogist (1890)

Ornithology - Jardine, William, 1800 -1874 (W.H. Lizars, 1853)

The ornithology of Shakespeare. Critically examined, explained, and illustrated - Harting, James Edmund, 1841 -1928 (J. Van Voorst, 1871)

The ornithology of the Straits of Gibraltar - Irby, L. Howard (Leonard Howard Lloyd), 1836 -1905 (R.H. Porter, 1895)

Ornitologia italiana : opera postuma - Savi, Paul, 1798 -1871 (Successori Le Monnier, 1873)

Ornitologia toscana; ossia, Descrizione e storia degli uccelli che trovansi nella Toscana, con l'aggiunta della descrizioni di tutti gli altri proprj al rimanente d'Italia - Savi, Paul, 1798 -1871 (Dalla tipografia Nistri, 1827)

L'Ornitologo Ticinese ossia manuale descrittivo gli Uccelli di stazione e di passaggio nel Cantone Ticino, &c - Riva, Antonio. (1865)

Osteologia avium, or, A sketch of the osteology of birds - Brooks, Vincent, 1815? -1885 (Published by R. Hobson, Wellington, Salop, 1867)

Osteologia avium : or a sketch of the osteology of birds - Eyton, T. C. (Thomas Campbell), 1809 -1880 (Salop, R. Hobson)

Our country's birds and how to know them. A guide to all the birds of Great Britain - Gordon, W. J. (Simpkin, Marshall, Hamilton, Kent, 1892)

Our Irish song birds - Benson, Charles William, 1836 -1919 (Hodges, Figgis, 1886)

Our Irish song birds - Benson, Charles William, 1836 -1919 (Hodges, Figgis, 1917)

Our resident birds and how to know them - Elms, E. F. M. (T. Butterworth, 1921)

Outlines of general zoology - Baird, Spencer Fullerton, 1823 -1887 (Rudolph Garrigue, 1851)

Over de ontwikkeling van de clavicula en het sternum van vogels en zoogdieren ... - Hommes, Johannes Hero. (1921)

Palestine Exploration Fund : quarterly statement - Palestine Exploration Fund. (The Fund, 1888)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1916)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1918)

Papers and proceedings of the Royal Society of Van Diemen's Land - Royal Society of Tasmania. (Royal Society of Van Diemen's Land, 1853)

Papers presented to the World's Congress on Ornithology - Coues, Elliott, 1842 -1899 (Charles H. Sergel Co, 1896)

Parasitology - British Society for Parasitology. (Cambridge University Press, 1916)

Partridges and partridge manors - Maxwell, Aymer 1877 -1914 (A. & C. Black, 1911)

Pest control by chemical, biological, genetic, and physical means; a symposium. Chairman: E. F. Knipling ... presented at the meeting of the American Association for the Advancement of Science, Section 0 on Agriculture, December 26-31, 1964 - Knipling, E. F. (Agricultural Research Service, U.S. Dept. of Agriculture, 1966)

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

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 Norwegens : ein Beitrag zur Natur- und Culturgeschichte Nord-Europas - Schübeler, F. C. (Frederik Christian), 1815 -1892 (1873)

Pleistocene birds of the palearctic : a catalogue - Nuttall Ornithological Club. (Nuttall Ornithological Club, 1998)