by Connor J.M
Published in North central regional research publication (USA). no. 287 (1983)

by Froning G.W, Maurer A.J, Hale K.K, Carlin A.F
Published in North Central Regional Research Publication (USA). no. 254 (1978)

by Hulet C.V
Published in North Central Regional Research Publication (USA). no. 248 (1978)

by Cook H.L, Blakley L, Jacobson R, Knutson R, Milligan R, Strain R
Published in North Central regional research publication - University of Wisconsin (1978)

by Wheat J.D. (ed.)
Published in North Central Regional Research Publication (USA). no. 241 (1977)

by Wheat J.D. (ed.)
Published in North Central Regional Research Publication (USA). no. 242 (1977)

by Knezek B.D. (ed.), Miller R.H. (ed.)
Published in North Central Regional Research Publication (USA). no. 235 (1976)

by Marion B.W. ed
Published in North Central Regional Research Publication (USA). no. 228 (1976)

by Matthews S.F, Rhodes V.J
Published in North Central Regional Research Publication (USA). no. 223 (1975)

by Farrell K.R
Published in North Central Regional Research Publication (1979)

by Mueller W.F
Published in North Central Regional Research Publication (1979)

by Henderson D.R
Published in North Central Regional Research Publication (1979)

by Caves R.E
Published in North Central Regional Research Publication (1979)

by Gould R.J
Published in North Central Regional Research Publication (1979)

by Knutson R.D
Published in North Central Regional Research Publication (1979)

by Powers M.J
Published in North Central Regional Research Publication (1979)

by Hayenga M.L, Gardner B.L, Paul A.B, Houck J.P
Published in North Central Regional Research Publication (1979)

by Powers, M.J
Published in North Central regional research publication (1979)

by Graf T.F
Published in North Central Regional Research Publication (1979)

by Schrader L.F
Published in North Central Regional Research Publication (1979)