by Hanson A.A. (ed.), Cruse R.M, Thomas G.W, Jensen M.E, Kamprath E.J, Duvick D.N, Bashaw E.C, Ouye M.T, Nelson R.R, Fausi M
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Kriesberg, M
Published in Yearbook of Agriculture - U.S. Dept. of Agriculture (USA) (1981)

by Absher C.W, Blosser T.H. (eds.), Seidel G.E, Mengeling W.L, Purchase H.G, Graham O.H, McDaniel B.T, Goering H.K, Witham R.L, Satter L.D
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Ashby B.H, Anthony J.P
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Goodloe, C, Blott, F
Published in Yearbook of Agriculture - U.S. Dept. of Agriculture (USA) (1981)

by Hardenburg R.E, Handwerk R.L
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Manfredi E.M, O'Flynn D
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Feinstein D, Nightingale R, Hanrahan C
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Dalrymple D.G
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Henderson, D.R
Published in Yearbook of Agriculture - U.S. Dept. of Agriculture (USA) (1981)

by Mackie A.B, Vollrath T.L, Cesal L.C
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Shaughnessy D.E
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Forker O.D
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Harris C.I
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Putnam, P.A, McBride, J. (eds.), Jackson, R.D, Bellows, R.A, Callis, J.J, Carlson, C.W, Valentine, R.C, Ignoffo, C, Ruff, M.D, Danforth, H.D, Lovell, R.T
Published in Yearbook of Agriculture - U.S. Dept. of Agriculture (USA) (1981)

by Ricker, H.S, Tallent, W.H
Published in Yearbook of Agriculture - U.S. Dept. of Agriculture (USA) (1981)

by Richmond, D.D
Published in Yearbook of Agriculture - U.S. Dept. of Agriculture (USA) (1981)

by Sundquist W.B
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)

by Paarlberg, D
Published in Yearbook of Agriculture - U.S. Dept. of Agriculture (USA) (1981)

by Wright L.E
Published in Yearbook of Agriculture U.S. Dept. of Agriculture (1981)