Ogg, F. A. Old Northwest: a chronicle of the Ohio Valley and beyond. New Haven, Yale Univ. press, 1921. 220p. (Chronicles of America series, v. 19.)
Ohio. Laws, statutes, etc. The statutes of Ohio and of the Northwestern territory, adopted or enacted from 1788 to 1835 inclusive: together with the Ordinance of 1787; numerous references and notes and copious indexes, ed. by Salmon P. Chase. Cincinnati, Corey & Fairbank, 1833-1835. 3v.
Parkman, Francis. France and England in North America. Boston, Little, Brown & Co., 1910. 13v.
Patterson, Isaac F., comp. The constitutions of Ohio. Cleveland, O., Arthur H. Clark Co., 1912. 358p.
Paxson, Frederick L. History of the American frontier, 1763-1893. Boston & New York, Houghton Mifflin Co., 1924. 598p.
Pershing, Benjamin H. Winthrop Sargeant, 1753-1820. (In Ohio archaeological and historical quarterly, v. 35, Oct., 1926. p. 583-602.)
Pickering, Octavius; Upham, Charles W. Life of Timothy Pickering. Boston, Little, Brown & Co., 1867-73. 4v.
Pierce, James O. Some legacies of the Ordinance of 1787. (In Minnesota historical society. Collections. St. Paul, 1901. v. 9, p. 509-518.)
Poole, William F. The early Northwest; an address before the American historical association, Dec. 26, 1888. New York, The Knickerbocker press, 1889. 26p. (In American historical association. Papers, 1888-89, v. 3, p. 277-300.) Ordinance of 1787, p. 287-294. The Ordinance of 1787, and Dr. Manasseh Cutler was an agent in its formation. Cambridge, Mass., Welch, Bigelow and Co., 1876. 38p. (In North American review, April 1876.) The Ordinance of 1787. A reply. Ann Arbor, Mich., Priv. print., 1892. 15p. (In The Inlander, Jan. 1892.) A reply to an article by Henry A. Chaney in The Inlander for Nov. 1891.
Powell, John W. Physiographic regions of United States. New York; Chicago, etc., American Bk. Co., 1895. (National geographic monographs, v. 1, no. 3.)