——. Otzinachson: A History of the West Branch Valley of the Susquehanna. Williamsport, 1889.

National Education Association. The Education of Free Men in American Democracy. Washington, 1941.

O'Callaghan, E. B. Documentary History of the State of New York, I. Albany, N. Y., 1849.

The Oxford Universal Dictionary. Oxford, 1955.

Parkes, Henry Bamford. The American Experience. New York, 1959.

The Pennsylvania Writers' Project, Work Projects Administration. A Picture of Clinton County. Williamsport, 1942.

——. A Picture of Lycoming County. Williamsport, 1939.

Proud, Robert. History of Pennsylvania in North America. 2 vols. Philadelphia, 1797, 1798.

Ranney, Austin, and Willmoore Kendall. Democracy and the American Party System. New York, 1956.

Rossiter, Clinton. The First American Revolution. New York, 1956.