Published by State of Oregon Department of Geology and Mineral Industries, Salem, OR, 1979
Softcover. Condition: Very Good. 8-1/2 x 11 Softcover; 79pp; Covers clean & bright, text unmarked, binding is tight, VG condition. Scarce, vintage report on the geology and geologic hazards of Northwestern Clackamas County in Oregon. Illustrated with maps, diagrams & photos.