Changes in farm production and efficiency
By: National Economic Analysis Division ; Donald D. Durost and Evelyn T. Black.
Contributors: Black, Evelyn T.
Series: Statistical bulletin - Dept. of Agriculture ; no. 581; Statistical bulletin (United States. Dept. of Agriculture) -- no. 581.
Publisher: Dept. of Agriculture, Economic Research Service, [National Economic Analysis Division]
Published: 1977
Place of publication: [Washington]
Language: eng
Number of pages: 70
Subjects: Agricultural machinery -- United States.; Crop yields.
Notes: Chiefly tables.

Issued Nov. 1977.