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Author/Creator
- Geological Survey of Canada27
- Canada. Surveys and Mapping Branch15
- Irish Academic Press13
- National Geographic Society (U.S.). Cartographic Division10
- Canada. Natural Resources Intelligence Service8
- Arrowsmith, John, 1790-18736
- Canada. National Development Bureau6
- Geological Survey (U.S.)6
- Canada. Dept. of the Interior5
- Canada. Natural Resources Canada5
- Imperial Oil Limited5
- International Boundary Commission5
- Canada. Travel Bureau4
- Canadian Government Travel Bureau4
- Canadian Hydrographic Service4
- Geological Association of Canada4
- International Geological Correlation Programme4
- Manitoba. Mineral Resources Division4
- Memorial University of Newfoundland4
- Sargent, Charles Sprague, 1841-19274