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- Lincoln Institute of Land Policy596
- Cartography Associates135
- Geological Survey (U.S.)125
- Stanford Digital Repository82
- Stanford University. Center for Spatial and Textual Analysis73
- National Atlas of the United States50
- Virtual Shanghai Project36
- National Geophysical and Solar-Terrestrial Data Center19
- GeoX Kft.4
- National Geophysical Data Center2
- Lew Rosenberg, Consulting Geologist1
- National Geospatial Program, The National Map Small Scale1
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