WILCOX, W. W., & COCHRANE, W. W. (1960). Economics of American agriculture.-- ed.2. Prentice-Hall.

WILCOX, Walter W., and Willard W. COCHRANE. Economics of American Agriculture.-- Ed.2. New Jersey: Prentice-Hall, 1960.

WILCOX, Walter W., and Willard W. COCHRANE. Economics of American Agriculture.-- Ed.2. Prentice-Hall, 1960.