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Roy Burton Gray

3 cilt bulundu.

Cilt sonuçları

Cooperative work pertaining to farm machinery in the South

Cooperative work pertaining to farm machinery in the South

Roy Burton Gray · Yayınevi bilinmiyor

10 sayfa · 1932

Economics / Cooperatives

TractorsDevelopment of the agricultural tractor in the United StatesRoy Burton Gray

Development of the agricultural tractor in the United States

Roy Burton Gray · American Society of Agricultural Engineers

Sayfa sayısı yok · 1954

Agricultural machinery / History / Tractors

Agricultural machineryThe agricultural tractor, 1855-1950Roy Burton Gray

The agricultural tractor, 1855-1950

Roy Burton Gray · American Society of Agricultural Engineers

91 sayfa · 1975

History / Farm tractors / Agricultural machinery