- United States, War Production Board
- Digital Commonwealth
- Boston Public Library
- U. S. Government Printing Office
Four images with captions: (1) "A Gas Mask requires 1.11 pounds of rubber," (2) "A Life Raft requires 17 to 100 pounds of rubber," (3) "A Scout Car requires 306 pounds of rubber," (4) "A Heavy Bomber requires 1,825 pounds of rubber. U.S. Government Printing Office : 1942--O-469847. War Production Board, Bureau of Industrial Conservation.
- No known copyright restrictions. No known restrictions on use.