Author

Roy Burton Gray

3 books found

Placeholder cover for The agricultural tractor, 1855-1950

The agricultural tractor, 1855-1950

Roy Burton Gray · First published 1975

Placeholder cover for Development of the agricultural tractor in the United States

Development of the agricultural tractor in the United States

Roy Burton Gray · First published 1954

Cover of Cooperative work pertaining to farm machinery in the South

Cooperative work pertaining to farm machinery in the South

Roy Burton Gray · First published 1932