by Burrill L.C, Cannon L.E, Duddles R.E, Poole A.P
Published in Proceedings of the Western Society of Weed Science (1992)

by Duddles, R.E. (Oregon State University.)
Published in Extension circular (Oregon State University. Extension Service) (USA) (01.01.1995)

by Duddles, R.E. (Oregon State University), Owston, P.W
Published in General technical report RM - Rocky Mountain Forest and Range Experiment Station, U.S. Department of Agriculture, Forest Service (USA) (01.12.1990)

by Duddles, R.E. (Oregon State University), DeCalesta, D.S
Published in Extension circular EC - Oregon State University, Extension Service (USA) (01.08.1992)

by Duddles, R.E. (Oregon State University Extension Service), Cloughesy, M
Published in Extension circular EC - Oregon State University, Extension Service (USA) (01.08.1992)

by Duddles, R.E. (Oregon State University Extension Service, Corvallis, OR), Landgren, C.G
Published in Extension circular (Oregon State University. Extension Service) (USA) (01.10.1993)

by DeCalesta, D.S. (Oregon State University Extension Service), Duddles, R.E, Bondi, M.C
Published in Extension circular EC - Oregon State University, Extension Service (USA) (01.04.1991)