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

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

Popular British ornithology : containing a familiar and technical description of the birds of the British Isles - Gosse, Philip Henry, 1810 -1888 (Reeve and co, 1853)

Popular British ornithology : containing a familiar and technical description of the birds of the British Isles - Gosse, Philip Henry, 1810 -1888 (Reeve, Benham, and Reeve, 1849)

A popular history of British birds' eggs - Laishley, Richard, Rev., 1816 -1897 (L. Reeve, 1858)

The popular natural history - Wood, J. G. (John George), 1827 -1889 (Burt Co, 1884)

Popular Science Review (1872)

Portraits of rare and curious birds, with their descriptions : from the menagery of Osterly Park, in the county of Middlesex - Hayes, W. (William), active 1775 -1800 (Printed by W. Bulmer and Co., and published for the author by R. Faulder, 1794)

The poultry book : a treatise on breeding and general management of domestic fowls : with numerous original descriptions, and portraits from life - Bennett, John C. (Phillips, Sampson, 1856)

The poultry book : a treatise on breeding and general management of domestic fowls, with numerous original descriptions and portraits from life - Bennett, John C. (Phillips, Sampson, 1850)

Practical game-preserving: a complete guide to the rearing and preservation of both winged and ground game, and the destruction of vermin - Carnegie, William. (L.U. Gill, 1906)

Practical game preserving : containing the fullest directions for rearing and preserving both winged and ground game, and destroying vermin; with ther information of value to the game preserver - Carnegie, William. (L. U. Gill, 1884)

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

Praktische Naturgeschichte der Vögel, für Gebildete aller Stände - Reichenbach, A. B. (Anton Benedikt), 1807 -1880 (1850)

Le préhistorique antiquité de l'homme - Mortillet, Gabriel de, 1821 -1898 (C. Reinwald, 1883)

A preliminary list of the birds found in Vermont - Perkins, George H. (George Henry), 1844 -1933 (Wynkoop Hallenbeck Crawford Co, 1901)

Les problèmes de la sexualité - Caullery, Maurice, 1868 -1958 (E. Flammarion, 1919)

Problems of genetics - Bateson, William, 1861 -1926 (Yale University Press, 1913)

Problems of genetics - Bateson, William, 1861 -1926 (Yale University Press, 1916)

Problems of genetics - Bateson, William, 1861 -1926 (Yale University Press; [etc., etc.], 1913)

Proceedings and Transactions of the Croydon Microscopical & Natural History Club - Croydon Microscopical; Natural History Club. (1871)

Proceedings and transactions of the Natural History Society of Glasgow - Natural History Society of Glasgow. (The Society, 1889)