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- Bush, Charles A.5
- Canada Centre for Mapping1
- Central Intelligence Agency1
- Digital Social Science Centaer, Columbia University Libraries11
- EROS Data Center2
- ESRI8
- Economic and Social Research Institute (Reston, Va.)16
- Environmental Systems Research Institute (Redlands, Calif.)67
- Esri26
- Gap Analysis Program (U.S.)2
- General Drafting Company3
- Geological Survey (U.S.)35
- Geological Survey (U.S.). Water Resources Division. Wisconsin District1
- GfK GeoMarketing GmbH 1
- GfK MACON14
- Global Resource Information Database1
- H.M. Gousha Company.1
- Health Forum, L.L.C.1
- Hijmans, Robert J.2
- Institute for Water Resources (U.S.). Navigation Data Center1