Poste, E. (editor). Gaii institutionum juris civilis commentarii quatuor. 3d ed. Oxford, 1890.
Poulton, E. B. The Colours of Animals. New York, 1890.
Powell, J. W. "Wyandotte Society: A Short Study of Tribal Society." Proceedings of the American Association for the Advancement of Science, XXIX, 675-88. Salem, 1880.
——— (director). Reports of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1881-95, 18 vols., 4to. Washington, 1879-99.
——— (in charge). Contributions to North American Ethnology. 9 vols. Washington, 1877-93. In U. S. Geographical and Geological Survey of the Rocky Mountain Region.
Pratz, Le Page du. "Des Mœurs & Coutumes des Peuples de la Louisiane, & particulièrement de celles des Natchez & de leur Langue." In his Histoire de la Louisiane, II, 307 ff., 385-406. Paris, 1758.
Puchta, O. F. Cursus der Institutionen. 2 vols. Leipzig, 1875.
Quaterfages, A. de. The Human Species. New York, 1890.
Raepsaet, J. J. Recherches sur l'origine et la nature des droits connus anciennement sous les noms de droits des premières nuits, de markette, d'afforage, marcheta, maritagium et Bumede. Gand, 1817.