Rosen, Paul L.
University of Illinois Press, 1972
Buku Teks
Stern, Robert L.
The Bureau of National Affairs, 1969
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Johnson, Gerald W., author
William Morrow and Company, 1962
Buku Teks
Woodward, Bob, author
Simon and Schuster, 1979
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Baum, lawrence
A Division of Congressional Quarterly Inc, 1989
Buku Teks