Do sunspot cycles affect crop yields? /

Bibliographic Details

Main Author:	Harrison, Virden L.
Corporate Author:	United States. Department of Agriculture. Economic Research Service
Format:	Government Document Book
Language:	English
Published:	[Washington] : U.S. Dept. of Agriculture, Economic Research Service, [1976]
Series:	Agricultural economic report ; no. 327.
Subjects:	Crop yields. Sunspots.