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Publisher
- Virtual Shanghai Project3
- Circuit Rider Productions2
- National Geophysical Data Center2
- United State. Geological Survey2
- United States. Geological Survey2
- Harvard Geospatial Library1
- Harvard Map Collection1
- Lew Rosenberg, Consulting Geologist1
- Lewis & Clark College1
- National Geospatial Program, The National Map Small Scale1
- New York Public Library1
- PDXScholar, Carl Abbott1
- University of Wisconsin Milwaukie1