Winter wheat in the great plains area
Chilott, E.C., Cole, J.S., Kuska, J.B.
Winter wheat in the great plains area - Washington 1917 - 1-35 p. - Wheat United States Department of Agriculture. Bulletin No. 595 .
Winter wheat in the great plains area - Washington 1917 - 1-35 p. - Wheat United States Department of Agriculture. Bulletin No. 595 .