TY - RPRT TI - Analog Records from an Airborne Electromagnetic Survey (Using the Dighem II System) of Parts of the Lake City Caldera, Hinsdale County, Colorado AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1981 DO - 10.3133/ofr811311 UR - https://pubs.usgs.gov/publication/ofr811311 ID - ofr811311 ER -