Oregon. Dept. of Geology and Mineral Industries; Kulm, LaVerne D., 1936-; Scheidegger, Kenneth Fred; Byrne, John Vincent, 1928-; Spigai, Joseph John; Pattullo, June G.; Burt, Wayne V.; Burdwell, Gerald B. (Oregon. Dept. of Geology and Mineral Industries., 1968-09)