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Publisher
- Maine Geological Survey,37
- Montana Bureau of Mines and Geology,21
- Geological Survey of Canada,18
- Geological Society of America,17
- U.S. Geological Survey ;11
- North Dakota Geological Survey,10
- Geological Survey of Japan,6
- Ohio Division of Geological Survey,5
- U.S. Dept. of the Interior, U.S. Geological Survey ;4
- Chishitsu Chōsajo,3
- Geological Publishing House,3
- Geological Survey, New York State Museum and Science Service :3
- New York State Museum and Science Service, Geological Survey :3
- The Survey ;3
- U.S. Geological Survey,3
- University of the State of New York, State Education Dept.,3
- American Association of Petroleum Geologists,2
- Azärbaycan Respublikası Dövlät Torpaq vä Xäritäçäkmä Komitäsi,2
- CMGW,2
- Di tu chu ban she :2