Washington, D.C. : For sale by the Superintendent of Document, U.S. Government Printing Office, 1970
Format:
Map
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Additional/Related Title Information
Full Title:
Percent change in corn yield per acre : by counties of the United States: 1939-1964 / prepared by Geography Division, in cooperation with the Agriculture Division, Bureau of the Census, U.S. Dept. of Commerce
Series Titles:
United States maps. GE-50 ; no. 34 United States maps. no. 34.