Nelson, W. H., Loewenheim, F. L., & Chamberlain, L. H. 1. (1964). Theory and practice in American politics. Chicago]: Published for William Marsh Rice University by University of Chicago Press.

Nelson, William H., Francis L. Loewenheim, and Lawrence H. 1906-1989 Chamberlain. Theory and Practice in American Politics. Chicago]: Published for William Marsh Rice University by University of Chicago Press, 1964.

Nelson, William H., Francis L. Loewenheim, and Lawrence H. 1906-1989 Chamberlain. Theory and Practice in American Politics. Chicago]: Published for William Marsh Rice University by University of Chicago Press, 1964.