Lindley, James; Holm, Edna; Hettiarachchy, Navam; Helgeson, Del; Hanzel, J.; Golz, J.; Wiesenborn, Dennis P.; Lindley, James; Holm, Edna; Hettiarachchy, Navam; Helgeson, Del; Hanzel, J.; Golz, J.; Wiesenborn, Dennis P. (North Dakota State University, 1991)