Hasbargen, Paul R.; Jacobs, Robert E.; University of Minnesota, Agricultural Extension Service (University of Minnesota, Agricultural Extension Service, 1977-10)
Fuller, Earl I.; Thomas, Kenneth H.; Freeman, Mervin L.; Appleman, Robert D.; University of Minnesota, Agricultural Extension Service (University of Minnesota, Agricultural Extension Service, 1982-04)
Feltes, Linda; Hasbargen, Paul; Fuller, Earl; University of Minnesota, Agricultural Extension Service (University of Minnesota, Agricultural Extension Service, 1983-12-01)
University of Minnesota, Agricultural Extension Service; Hasbargen, Paul R.; Jacobs, Robert; Freeman, Mervin L. (University of Minnesota, Agricultural Extension Service, 1973-10)
University of Minnesota, Agricultural Extension Service; Hasbargen, Paul R.; Jacobs, Robert; Penning, William (University of Minnesota, Agricultural Extension Service, 1973-10)