1985 Material Efficacy Against Walnut Blight and Phytotoxicity Evaluation Olson, Bill, Bill Krueger. 1985.
1984 Helicopter vs Air Blast Sprayer for Walnut Blight Control Olson, Bill, Bill Krueger, Beth Teviotdale. 1984.
1982 Management Systems for High Density Walnut Orchards Ramos, D., Kay Ryugo, William Olson, Joe Osgood, William Krueger, Ronald Snyder. 1982.
1991 Evaluation of Walnut Under High Density Planting and Management Systems Ramos, D., W. Olson, J. Osgood, W. Krueger, G.S. Sibbett, W. Reil, K. Kelley, R. Snyder, K. Ryugo. 1991.