Decent interval : an insider's account of Saigon's indecent end told by the CIA's chief strategy analyst in Vietnam / Frank Snepp. Snepp, Frank. United States. Central Intelligence Agency. Vietnam War, 1961-1975 United States. Vietnam War, 1961-1975. Vietnam War, 1961-1975 Secret Service United States. DS558 .S58 1978 959.704 SND New York : Vintage Books, c1977. c1977. 1978 Text xii, 590 p., [8] leaves of plates : eng United States. United States.