by Pershing, R.L, Redman, A.P
Published in Paper - American Society of Agricultural Engineers (Microfiche collection) (1982)

by Pershing, R.L, Yoerger, R.R
Published in Amer Soc Agr Eng Trans Asae (1969)

by Loewer, O.J, Anderson, C.W, Bosworth, D.L, Hale, J.K, Harper, R.W, Johnson, L.R, Kehrwald, J.P, Pershing, R.L, Ruff, J.H, Schramm, H.J
Published in Paper - American Society of Agricultural Engineers (USA) (1991)