Proceedings of the Yorkshire Geological and Polytechnic Society - Yorkshire Geological; Polytechnic Society. (Yorkshire Geological and Polytechnic Society, 1900)

Proceedings of the Yorkshire Geological Society - Yorkshire Geological Society. (Yorkshire Geological Society, 1906)

Proceedings of the Yorkshire Geological Society - Yorkshire Geological Society. (Yorkshire Geological Society, 1909)

Proceedings of the Yorkshire Geological Society - Yorkshire Geological Society. (Yorkshire Geological Society, 1915)

Proceedings of the Yorkshire Geological Society - Yorkshire Geological Society. (Yorkshire Geological Society, 1914)

Prodrome d'une histoire des végétaux fossiles - Brongniart, Adolphe, 1801 -1876 (F. G. Levrault, 1828)

Products of the empire - Cunningham, J. Clinton. (The Clarendon Press, 1928)

Progressus rei botanicae = Fortschritte der Botanik = Progrès de la botanique = Progress of botany - Association internationale des botanistes. (G. Fischer, 1907)

Publication - Botanical Society of America. (The Society)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1873)

The Quarterly journal of science (J. Churchill and Sons, etc, 1864)

The Quarterly journal of science (J. Churchill and Sons, etc, 1867)

The Quarterly journal of science (J. Churchill and Sons, etc, 1869)

The Quarterly journal of science (J. Churchill and Sons, etc, 1875)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1845)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1846)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1847)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1848)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1849)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1850)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1851)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1852)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1853)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1854)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1855)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1856)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1857)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1858)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1859)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1860)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1861)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1862)