Development of the agricultural tractor in the United States
By: by R. B. Gray.
Contributors: American Society of Agricultural Engineers.
Publisher: American Society of Agricultural Engineers
Published: 1974
Place of publication: St. Joseph, Mich
Language: eng
Subjects: Agricultural machinery -- History.; Tractors -- History.
Other titles: The agricultural tractor 1855-1950.
Notes: Cover title: The agricultural tractor 1855-1950.

Pt. 1 originally printed in 1954; Pt.2 originally printed in 1958.
Table of contents: value: Pt. 1. Up to 1919 inclusive.; value: Pt. 2. 1920 to 1950 inclusive.