Laying out fields for tractor plowing /
Reed, I. F.(Irvin Fay),1903-
United States.Department of Agriculture.
Washington, D.C. : U.S. Dept. of Agriculture,
1954.
"A revision of previous editions, by H.R. Tolley, C.D. Kinsman, L.A. Reynoldson, and I.F. Reed."
Plowing.
Farm tractors.