Griffith, Ernest S.
Congress Its contemporary role/ Ernest S. Griffith
New York University press, 1956
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Congress reconsidered
Editor by Lawrence C.Dood; Bruce I. Oppenheimer
Congressional Quarterly Press, 1981
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Howard D.Samuel
Congress at work/ Stephen K. Bailey
Henry Holt and Company, 1953
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Keefe, William J.
The American legislative process congress and the state
Prentice-Hall, 1994
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Annual report of the librarian of congress 1990
Library of Congress; edited by James W. Mc. Chung
Library of Congress, 1991
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