Sorghum movements in the United States : interregional flow patterns and transportation requirements in 1977 /

Includes bibliographical references.

Corn movements in the United States : interregional flow patterns and transportation requirements in 1985 /

"September, 1990."

Sorghum movements in the United States : interregional flow patterns and transportation requirements in 1985 /

" ... contribution to North Central Project NC-137, 'Effect of changes in transportation on performance of the U.S. Agricultural Transportation System, 'and to Southern Regional Project S-176 Interregional marketing systems for grains and soybeans.'"--P. iii.