1980 Walnut Blight Control Studies Olson, Bill, Larry Fitch, Beth Teviotdale, Peter Lindgren, Wilbur Reil, Dennis Harper. 1980.
1981 The Effect of Ring Nematodes, Root-Lesion Nematodes and Soil Moisture Level on Deep Phloem Canker Lownsbery, B.F., Beth Teviotdale, T.M. Burlando, Dennis Harper. 1981.
