date(s):
1937-1960
creator(s):
The Instructograph Company; AMECO; Western Electric; American Telephone and Telegraph Company
subject(s):
Civil defense; Cold War
place(s):
1190 N Convent St, Bourbonnais, IL 60914, USA; New York, NY, USA; New York, NY, USA
type(s):
Device, Morse Code Instruction