Clyde M. Christensen was Regents’ Professor of Plant Pathology at the University of Minnesota, where he taught for over 30 years. Among his many publications are four books published by the University of Minnesota Press: Common Edible Mushrooms (1943; a second edition, revised, entitled Edible Mushrooms, appeared in 1981), The Molds and Man (1951), Molds, Mushrooms, and Mycotoxins (1975), and, with Henry H. Kaufmann, Grain Storage: The Role of Fungi in Quality Loss (1969).
Richard A. Meronuck was a professor of Plant Pathology and Agricultural Extension specialist at the University of Minnesota. He worked closely with grain handlers as a teacher and consultant. His articles have appeared in Phytopathology, the Journal of Stored Products Research, Transactions of the American Society of Agricultural Engineers, Cereal Foods World, and a number of other agricultural publications.