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- Geological Survey (U.S.)36
- United States. Central Intelligence Agency4
- Aerospace Center (U.S.)2
- Cyprus. Tmēma Geōlogikēs Episkopēsēs.1
- Český geologický ústav, Praha1
- Haley, Boyd Raymond, 1922-1
- New Zealand Minimaps Ltd1
- Petroleum Economist Ltd1
- Smith, William, 1769-18391
- Virginia. Division of Mineral Resources1
- Weller Cartographic Services Ltd1
