Memorandum on municipal signaling systems
Subtitle: including specifications for emergency electrical power equipment.
By: Prepared by Defense communications board.
Contributors: United States. Office of Civilian Defense.
Publisher: United States Office of civilian defense
Published: 1941
Place of publication: Washington, D.C
Language: eng
Number of pages: 24
Subjects: Electric alarms.; Electric generators.
Notes: "This is Publication no. 12 of the Office of civilian defense."--Verso of t.-p.