Berryman, A. A. (Alan Andrew), 1937-; Amman, Gene D.; Stark, Ronald W.; National Science Foundation (U.S.) (Moscow : Forest, Wildlife and Range Experiment Station, University of Idaho, in collaboration with USDA Forest Service, Forest Insect and Disease Research, Washington, D. C, and the Intermountain Forest and Range Experiment Station, Ogden, Utah, 1978-12)