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- Arctic Climate System (ACSYS)47
- International Association of Seismology and Physics of the Earth's Interior10
- International Heat Flow Commission10
- Oklahoma State University. Department of Geography. Cartography Service10
- Central Intelligence Agency9
- Circuit Rider Productions6
- Instituto Brasileiro de Geografia e EstatÃstica5
- Chandler, Val W.4
- East View Cartographic, Inc.4
- United States. Defense Mapping Agency4
- Environmental Systems Research Institute (Redlands, Calif.)3
- ML InfoMap (Firm)3
- Digital Social Science Center (DSSC), Columbia University Libraries2
- All China Marketing Research Co., Ltd.1
- Boerboom, Terrence J.1
- Centre County Natural Heritage Inventory1
- Dahl, Thomas E.1
- Geological Survey (U.S.)1
- Illinois State Geological Survey1
- Jirsa, Mark A.1