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Projected Least-cost Number and Size of Machinery Complements for Tillage Operations in the Wheat Growing Region of Eastern Washington in 1985
David W. Price
Jack R. Nelson
Kevin W. O'Connell
Louis C. Boawn
S. C. Thonney
Dennis C. Le Master
Jagjit Singh Brar
出版
Washington State University, College of Agriculture Research Center
, 1977
URL
http://books.google.com.hk/books?id=NItRAQAAMAAJ&hl=&source=gbs_api