elvin f frolik

Elvin F. Frolik · Board of Regents of the University of Nebraska

493 sayfa · 1987

History / University of Nebraska--Lincoln / University of Nebraska--Lincoln. College of Agriculture

Elvin F. Frolik, Ralston J. Graham · Univ of Nebraska Pr

Sayfa sayısı yok · 1989

Agricultural Education / History: American

T. A. Kiesselbach, R. L. Cushing, Elvin F. Frolik · University of Nebraska, College of Agriculture, Experiment Station

28 sayfa · 1938

Sorghum / Varieties