Blewett. Geology and Landscape of Michigan’s Pictured Rocks National Lakeshore and Vicinity. Wayne State University Press.
Chicago-viite (17. p.)Blewett. Geology and Landscape of Michigan’s Pictured Rocks National Lakeshore and Vicinity. Wayne State University Press.
MLA-viite (8. p.)Blewett. Geology and Landscape of Michigan’s Pictured Rocks National Lakeshore and Vicinity. Wayne State University Press.
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