ОписаниеFig 4 Map of portions of southern Alberta and Northern Montana.jpg
English: Fig 4 Map of portions of southern Alberta and Northern Montana
Дата
Источник
William C. Alden; Physiography and Glacial Geology of Eastern Montana and Adjacent Areas, Professional Paper 174; Geological Survey, W. C. Mendenhall, Director; United States Department of the Interior, Ray Lyman Wilbur, Secretary; United States; Government Printing Office; Washington, D.C.; 1932
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