ОписаниеFig 11 Cross section showing the drift in the valley.jpg
English: Fig 11 Cross section showing the drift in the valley
Дата
Источник
Fred. H. H. Calhoun Sr.; The Montana Lobe of the Keewatin Ice Sheet; Professional Paper No 50 Series B, Descriptive Geology, 79; Department of the Interior, United States Geological Survey, Charles D. Walcott, Director; Washington, D.C.; Government Printing Office; 1906
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