Sources list for AMERICA TWO PARTY SYSTEM POSITIVES

Bartolini and Peter Mair, especially chapter 2. See also Peter Mair, "Continuity, Change and the Vulnerability of Party," in Peter Mair and Gordon Smith, eds., Understanding Party System Change in Western Europe (London: Frank Cass, 1990), 169-87
Western European and English Political Parties

The Free Dictionary. (2004). Two-party System. Retrieved from the Internet at: http://encyclopedia.thefreedictionary.com/Two-party%20system.
Britain and France - Political Comparison

Bartolini and Peter Mair, especially chapter 2. See also Peter Mair, "Continuity, Change and the Vulnerability of Party," in Peter Mair and Gordon Smith, eds., Understanding Party System Change in Western Europe (London: Frank Cass, 1990), 169-87
Political Science in Western Europe

Seymour M. Lipset and Stein Rokkan, "Cleavage Structures, Party Systems, and Voter Alignments: An Introduction," in Lipset and Rokkan, 50.
Western European and English Political Parties

ROSE, Richard, and URWIN, Derek W.: <<Persistence and Change in Western Party Systems Since 1945>>, Political Studies 18/1970, p. 287-319.
Western European and English Political Parties