agriculture, machines, Caterpillar D7 tracked tractor doing cultivation work, USA, 1960s, Additional-Rights-Clearences-Not Available

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Photo credit: © INTERFOTO / History / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 20th, 60s, agricultural, agriculture, america, arable, caterpillar, caterpillars, century, crawler, crawlers, creeper, cultivation, d7, engineering, farm, farming, field, fields, historic, historical, labor, labour, machine, machines, people, states, technics, technologies, technology, tillage, tilth, tracked, tracklaying, tractor, tractors, type, types, united, usa, work