Helicopter airborne electromagnetic survey (using the Digham II system) of parts of the Lake City Caldera, Hinsdale County, Colorado [unknown]

D.C. Fraser, Z. Dvorak
1980 Antarctica A Keystone in a Changing World   unpublished
doi:10.3133/ofr80917 fatcat:nn7mvofwtvg2jcrtevpif4fg4e