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- Geological Survey (U.S.)16
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- Iowa. Department of Natural Resources. Geological Survey Bureau2
- Nelles Verlag2
- Stringall, Stephen C.2
- Ajide, T. S., cartographer1
- Breckenridge, Roy M.1
- Falk-Verlag, cartographer1
- GeoData (Firm)1
- Geoprojects (Great Britain) Ltd1
- ITMB Publishing Ltd1
- Indonesia. Direktorat Vulkanologi1
- National Geophysical Data Center, cartographer1
- SIL Tchad, cartographer1
- United States. Bureau of Land Management. Monticello Field Office, cartographer1
- United States. Central Intelligence Agency, cartographer1
