Digital geologic map of Yellowstone National Park, Idaho, Montana, and Wyoming and vicinity
U.S. Department of the Interior, U.S. Geological Survey ; geologic compilation and digital database by Robert L. Christiansen ; Open file report and metadata by Ronald R. Wahl.
Kart Engelsk 1999 Geological Survey (U.S.),· Maps.
| Utgave | Online version 1.0, 5 April 1999.
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| Opplysninger | Title from Web page (viewed on Jan. 11, 2001).
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| Geografisk emneord |
