Do sunspot cycles affect crop yields?
By: by Virden L. Harrison
Contributors: United States. Dept. of Agriculture. Economic Research Service
Series: Agricultural economic report ; no. 327; Agricultural economic report -- no. 327
Publisher: U.S. Dept. of Agriculture, Economic Research Service
Published: 1976
Place of publication: [Washington]
Language: eng
Number of pages: 23
Subjects: Crop yields; Sunspots
Notes: Cover title

Tables

Bibliography: p. 22-23