Farm tractors : Trends in type, size, age and use
Csorba, J.J.
Farm tractors : Trends in type, size, age and use - Washington 1960 - 16 p. - United States Department of Agriculture .
631.372
Farm tractors : Trends in type, size, age and use - Washington 1960 - 16 p. - United States Department of Agriculture .
631.372