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Keep mum chum - WPA poster, Public domain, Library of Congress
Poster suggesting careless communication may be harmful to the war effort, showing an army cap and a hand sinking in water. Date stamped on recto: Jan 21 '43. Work Projects Administration Poster Collection (Lib... More
Keep mum Loose talk costs lives.
Poster suggesting careless communication may be harmful to the war effort, showing a train blowing up. Date stamped on recto: Jan 21 '43. Work Projects Administration Poster Collection (Library of Congress).