by McElroy, R.C
Published in USDA Agr Econ Rep (1973)

by Rogers, G.B
Published in USDA Agr Econ Rep (1972)

by Gray, L.R, Hart, M.R
Published in USDA Agr Econ Rep (1972)

by Russell, J.R
Published in USDA Agr Econ Rep (1972)

by Mikesell, J.J
Published in USDA Agr Econ Rep (1971)

by Fox, A.S, Jenkins, R.P, Holstun, J.T, Klingman, K.L
Published in USDA Agr Econ Rep (1971)

by Crecink, J.C
Published in USDA Agr Econ Rep (1970)

by Freeman, R.E
Published in USDA Agr Econ Rep (1970)

by Bryan, C.H, Bertrand, A.L
Published in USDA Agr Econ Rep (1970)

by Fox, A.S, Jenkins, R.P, Andrilenas, P.A, Holstum, J.T, Klingman, D.L
Published in USDA Agr Econ Rep (1970)

by Grant, W.R, Moore, D.S
Published in USDA Agr Econ Rep (1970)

by McElveen, J.V
Published in USDA Agr Econ Rep (1969)

by McElroy, R.C
Published in USDA Agr Econ Rep (1969)

by Coffman, G.W, Scofield, W.H
Published in USDA Agr Econ Rep (1969)

by Starbird, I.R, French, B.L
Published in USDA Agr Econ Rep (1969)

Published in USDA Agr Econ Rep (1971)