Development of the agricultural tractor in the United States.
Contributors: American Society of Agricultural Engineers.
Publisher: U.S. Dept. of Agriculture, Agricultural Research Service, Agricultural Engineering Research Branch, Farm Machinery Section; American Society of Agricultural Engineers
Published: 1956
Place of publication: [Beltsville, Md
Language: eng
Subjects: Agricultural machinery -- United States -- History.; Tractors -- History.
Notes: Cover title.

Pt.1-2: facsimile reprint of 1956-1958.

Library has other copy of pt.1, published as Information series, no.107, by U.S. Agricultural Research Service (S711.U5)
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