- Interior--Geological Survey2
- Maine Geological Survey2
- Minnesota Geological Survey, University of Minnesota2
- Missouri Dept. of Natural Resources, Division of Geology and Land Survey?2
- National Geographic Society2
- North Carolina Dept. of Natural Resources and Community Development, Division of Land Resources, Geological Survey Section2
- State of Md., Dept. of Natural Resources, Md. Geological Survey2
- The Survey ; Open-File Services Section, Western Distribution Branch2
- U.S. Department of Agriculture, Forest Service2
- Alaska Dept. of Natural Resources, Division of Geological & Geophysical Surveys1
- Arnoldo Mondadori editore1
- Central Intelligence Agency, 19831
- Central Intelliglence Agency1
- Commission for the Geological Map of the World1
- Commonwealth of Virginia, Dept. of Conservation and Economic Development, Division of Mineral Resources1
- Delaware Geological Survey, University of Delaware, Williams & Heintz Map Corp.)1
- Dept. of Mines and Energy, Nova Scotia1
- Dionýz Štúr Institute of Geology1
- For sale by Branch of Distribution, U.S. Geological Survey1
- Forest Service, Southern Region1
GeoBlacklight version 4.1.0
