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Publisher
- E. Raisz,4
- Ontario Geological Survey,4
- Dept. of Conservation and Natural Resources ;2
- Geological Survey of Canada,2
- Institute of Geographical Exploration, Harvard University,2
- The Survey ;2
- Arizona Bureau of Geology and Mineral Technology,1
- Cooperative Extension Service, University of Florida, Institute of Food and Agricultural Sciences,1
- Geological Publishing House,1
- Geological Society of America,1
- Geological Survey ,1
- Ministerstvo životného prostredia Slovenskej republiky,1
- N.Y. State Museum,1
- Published by the British Antarctic Survey,1
- Raven Maps & Images,1
- State of Arizona, Bureau of Geology and Mineral Technology,1