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Photograph

McCormick-Deering TracTractor

Date: 1935
Description: Men using a McCormick-Deering TracTractor (crawler tractor) on a construction project, possibly a tunnel.
Photograph

Trucks at Hoover Dam

Date: 03 1932
Description: Two International trucks exit a tunnel on a dirt road leading through a canyon during the construction of the Hoover Dam. Two men stand on the top of a squ...

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