Popular Science Monthly, v. 135, n. 6, 1939

Google Books

135

1939-12

Public domain (Google digitized)

Is Part Of
Title	Alternate label	Class
How radio gathers the war news
Shells serve as models for fast war planes
Enemies spied by cameras mounted on British planes
The developments in air warfare and the training of U. S. plane pilots
British planes have automatic fire extinguishers
Ski-equipped stretchers used by Italian troops on the Alps
Control room of London's civilian air-raid defense system
Radio-controlled miniature plane used to train gunners
U. S. Army movies help training soldiers for war
Power-plant towers hidden by a camouflage
Fast British torpedo boats
All-metal stretchers used in England