Shultz, Richard H. The secret war against Hanoi : the untold story of spies, saboteurs, and covert warriors in North Vietnam / Richard H. Shultz, Jr. - New York : Perennial, 2000 - xvii, 408 p. : ill., map ; 21 cm. Includes bibliographical references and index ISBN: 0060194545 RM59.90 LCCN: 99-044524 Subjects--Topical Terms: Subversive activities--Vietnam (Democratic Republic) Subjects--Geographic Terms: Vietnamese--United StatesUnited States--Politics and government--1961-1963United States--Politics and government--1963-1969