Partial history of haying equipment
By: compiled by W.R. Humphries and R.B. Gray.
Contributors: Gray, R. B.
Series: Information series -- no. 74.
Publisher: U.S. Dept. of Agriculture, Bureau of Plant Industry, Soils and Agricultural Engineering
Published: 1949
Place of publication: Beltsville, Md
Language: eng
Number of pages: 58
Subjects: Agricultural machinery -- History.; Haying equipment -- History.
Notes: Caption title.

Contains bibliographies.