SP-19 Colorado Tectonics SP-19 Colorado Tectonics, Seismicity and Earthquake Hazards: Proceedings and Field Trip Guide of a Symposium Held in Denver, Colorado, June 4-6, 1981
RS-08 Proceedings of the Fifteenth Forum on Geology of Industrial Minerals-Industrial Minerals in Colorado and the Rocky Mountain Region RS-08 Proceedings of the Fifteenth Forum on Geology of Industrial Minerals: Industrial Minerals in Colorado and the Rocky Mountain Region