This must be stopped!

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This must be stopped! Motormen must not follow the swamper too closely. Office for Emergency Management. War Production Board. (01/1942 - 11/03/1945)

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Size: 2223px × 2895px
Location: US
Photo credit: © The Protected Art Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: miner, motormen, safety, swamper