FM 31-21 Guerrilla Warfare and Special Forces Operations - Washington, DC 1961 - 259 p. illus., diagrs. 23 cm. - Its Field manual FM31-21 . - United States. Department of the Army. Training publication ; FM31-21. . Cover title. Tables. Includes bibliography. LCCN: 62061203 Subjects--Topical Terms: Guerrilla warfare. LC Class. No.: U408.3 / .A13 FM31-21