1980 Pruning vs Tree Thinning of Close Planted Hartleys Holmberg, D.H., D.E. Ramos, K. Ryugo, R. Snyder. 1980.
1979 Pruning Vs Whiskbrooming of Close Planted Hartleys Ramos, D.E., D.H. Holmberg, R.G. Snyder. 1979.
1983 Selective Pruning of Close-Planted Serr Walnuts Leading to Eventual Thinning Hendricks, Lonnie, Dave Ramos, Ron Snyder. 1983.
1982 Selective Pruning of Close-Planted Serr Walnuts Leading to Eventual Thinning Hendricks, Lonnie, Dave Ramos, Ron Snyder. 1982.