Rowan, Richard Wilmer, Secret service; thirty-three centuries of espionage, by Richard Wilmer Rowan with Robert G. Deindorfer. - New and rev. ed. - New York : Hawthorn Books , 1967 - xi, 786 p.; 24 cm. Includes bibliography Subjects--Topical Terms: Espionage.Secret service. Dewey Class. No.: 327.1 / ROS 1967