1. S. M. Lipset, Martin Trow, andJ. S. Coleman, Union Democracy, Glencoe: The Free Press, 1956,pp. 17-32, 393-400Lipset17Union Democracy1956
2. Lee Benson, "Research Problems in American Political His-toriography," in Mirra Komarovsky (ed.), Common Frontiers ofthe Social Sciences, Glencoe: The Free Press, 1957, esp. pp. 114-115.BensonResearch Problems in American Political Historiography114Common Frontiers of the Social Sciences1957