Air raid warning system
Contributors: United States. Office of Civilian Defense
Publisher: Office of civilian defense
Published: 1941
Place of publication: Washington, D.C
Language: eng
Number of pages: 18
Subjects: Civil defense -- United States; Aeronautics, Military -- United States
Notes: Prepared by the War dept. with the assistance and advice of other federal agencies, August, 1941. Issued by the United States Office of civilian defense, Washington, D.C. September 1941, no. 11."--p. [2]