by Willett G.S
Published in EM - Cooperative Extension Service (1980)

by Willett G.S
Published in EM - Cooperative Extension Service (1978)

by Willett G.S
Published in EM - Cooperative Extension Service (1976)

by Willett G.S
Published in EM - Cooperative Extension Service (1976)

by Willett G.S, Wirth M.E
Published in WREP - Western Region Extension Publication - Cooperative Extension Service (USA). no. 34 (1980)

by Hinman H.R, Willett G.S
Published in EM - Cooperative Extension Service (1980)

by Willett G.S, Pietsch W.H
Published in EM - Cooperative Extension Service (1980)

by Willett G.S, Becker M.H
Published in EM - Cooperative Extension Service (1979)

by Willett G.S, Wirth M.E
Published in EM - Cooperative Extension Service (1978)

by Hinman H.R, Erickson D.H, Willett G.S
Published in EM - Cooperative Extension Service (1981)

by Hinman H.R, Erickson D.H, Willett G.S
Published in EM - Cooperative Extension Service (1981)

by Hinman H.R, Erickson D.H, Willett G.S
Published in EM - Cooperative Extension Service (1981)

by Hinman H.R, Erickson D.H, Willett G.S
Published in EM - Cooperative Extension Service (1981)

by Erickson D.H, Willett G.S, Kirpes D.J
Published in EM - Cooperative Extension Service (1980)

by Hinman H.R, Erickson D.H, Willett G.S
Published in EM - Cooperative Extension Service (1980)

by Erickson D.H, Willett G.S, Kirpes D.J
Published in EM - Cooperative Extension Service (1980)

by Erickson D.H, Willett G.S, Kirpes D.J
Published in EM - Cooperative Extension Service (1980)

by Willson H.M, Willett G.S, Kirpes D.J
Published in EM - Cooperative Extension Service (1980)

by Warnock W.D, McKinney C.H, Willett G.S
Published in EM - Cooperative Extension Service (1980)

by Wilson P.N, Fox R.W, Willett G.S
Published in Report - Dept. of Agricultural Economics (1976)