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- Geological Survey of Canada66
- The Survey18
- Canada Dept. of Mines and Resources, Mines and Geology Branch, Bureau of Geology and Topography8
- Geological Survey7
- U.S. Coast and Geodetic Survey6
- Canada Department of Mines and Resources, Mines and Geology Branch, Bureau of Geology and Topography5
- Irish Academic Press5
- The Dept5
- Defense Mapping Agency Hydrographic Center4
- Dept. of Lands4
- Army Map Service3
- Bureau of Geology and Topography, Mines and Geology Branch3
- Geological Survey of Canada,3
- Geological Survey of Canada, Dept. of Mines and Technical Surveys3
- The Center3
- The Department3
- The Society3
- Canada, Dept. of Mines, Geological Survey2
- Dept. of Mines, Geological Survey2
- Geological Survey Branch, Depertment of Mines2
