Solar-assisted combination grain drying :
an economic evaluation /
Walter G. Heid, jr.

APA Citation

Heid, W. George., United States. Dept. of Agriculture. Economics, S. (1980). Solar-assisted combination grain drying: an economic evaluation. [Washington]: Dept. of Agriculture, Economics, Statistics, and Cooperatives Service : for sale by the Supt. of Docs., U.S. Govt. Print. Off..

MLA Citation

Heid, Walter George, 1932-, and Statistics United States. Dept. of Agriculture. Economics. Solar-assisted Combination Grain Drying: an Economic Evaluation. [Washington]: Dept. of Agriculture, Economics, Statistics, and Cooperatives Service : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1980.