Origin and distribution of the commercial potato crop,
by J. W. Strowbridge ...
- [Washington, U.S. Govt. Print. off., 1939]
- 64 p. illus. (maps) diagrs. 23 cm.
- United States. Dept. of agriculture. Technical bulletin ; no. 7 .
- Technical bulletin (United States. Department of Agriculture) ; no. 7. .
Caption title. Contribution from Bureau of agricultural economics. "Issued July 1927; revised April 1939."