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Amherst meeting of the Geological society of America, Palaeontological society, Mineralogical society of America, and Society of economic geologists December 28-30, 1921
- "Conference papers and proceedings"@en
- "Amherst meeting of the Geological society of America, Palaeontological society, Mineralogical society of America, and Society of economic geologists December 28-30, 1921"@en