Farm-making costs and the "safety valve"
Subtitle: 1850-60
By: [by] Clarence H. Danhof ...
Published: 1941
Place of publication: Chicago]
Language: eng
Number of pages: 359
Subjects: Agriculture; Economic aspects; Economic conditions
Other titles: The "safety valve."
Notes: Cover-title.

"Reprinted ... from the Journal of political economy, vol. XLIX, no. 3, June 1941."

Thesis (Ph. D.)--University of Michigan, 1939.

Bibliographical foot-notes.