Columbia subject headings:
Harvard subject headings:
Intelligence service--United States.
Johnson, Lyndon B. (Lyndon Baines), 1908-1973.
United States--Foreign relations--Vietnam.
United States. Central Intelligence Agency
Vietnam War, 1961-1975
Vietnam War, 1961-1975--Diplomatic history
Vietnam War, 1961-1975--Secret service--United States
Vietnam--Foreign relations--United States.
Vietnam--Politics and government--1945-1975.
Vietnam--Politics and government.
Princeton subject headings:
United States--Foreign relations--Vietnam.
United States. Central Intelligence Agency
Vietnam War, 1961-1975--Diplomatic history.
Vietnam War, 1961-1975--Secret service--United States.
Vietnam--Foreign relations--United States.
Vietnam--Politics and government--1945-1975.