Oregon. Dept. of Geology and Mineral Industries; Mason, Ralph S.; Newton, Vernon C.; Hull, Donald A.; Beaulieu, John D.(Oregon Department of Geology and Mineral Industries, 1976-01)
Bowen, Richard G.; Blackwell, David D.; Hull, Donald A.; Peterson, Norman V.; Oregon. Dept. of Geology and Mineral Industries(Oregon Department of Geology and Mineral Industries, 1976-03)