Photo gallery series

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R. G. LeTourneau heavy equipment

the electric drive era 1953-1970
  • Orlemann, Eric C.
Explores the history of heavy equipment focusing on the design of R. G. LeTourneau from 1953 through 1970.

Caterpillar earthmovers at work

a photo gallery
  • Robertson, Bill
Archival photographs and text describe Caterpillar earthmoving machines from the 1950s and 1960s.
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