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Author
- Geological Survey (U.S.)267
- Tanzania. Idara ya Upimaji na Ramani45
- U.S. Fish and Wildlife Service20
- United States. Central Intelligence Agency19
- National Wetlands Inventory (U.S.)8
- United States. Forest Service. Northern Region5
- United States. Forest Service. Southern Region5
- National Geographic Society (U.S.). Cartographic Division4
- McIntosh, Willard L.3
- Othberg, Kurt L.3
- United States. Forest Service. Eastern Region3
- Brooks, H. K. (Harold Kelly), 1924-2
- Canada. Mapping and Charting Establishment2
- Di tu chu ban she2
- Giles, P. S.2
- Great Britain. Directorate of Overseas Surveys2
- John Bartholomew and Son2
- Leach, Stanley D.2
- Nigeria. Federal Surveys2
- Price, Don, 1929-2
