To reason why : the debate about the causes of U.S. involvement in the Vietnam War / Kimball, Jeffrey P. Vietnam War, 1961-1975 959 HIL 1990 A100 Or. New York, N.Y. : McGraw-Hill, c1990. c1990. Text xvii, 355 p. : http://www.loc.gov/catdir/description/mh022/89012158.html