1949. Schwartz, George M. (George Melvin), 1892-1980. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 51 North, Range 14 West, sc... Minnesota Geological Survey.
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1949. Schwartz, George M. (George Melvin), 1892-1980. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 51 North, Range 15 West, sc... Minnesota Geological Survey.
1949. Schwartz, George M. (George Melvin), 1892-1980. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 52 North, Range 11 West, sc... Minnesota Geological Survey.
1949. Schwartz, George M. (George Melvin), 1892-1980. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 52 North, Range 12 West, sc... Minnesota Geological Survey.
1949. Schwartz, George M. (George Melvin), 1892-1980. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 52 North, Range 13 West, sc... Minnesota Geological Survey.
1949. Schwartz, George M. (George Melvin), 1892-1980. Maps showing sequence of geologic units (beds) alongshore from Duluth East City Limits to Near Knife River, scale 1 inch = about 1800 feet. Minnesota Geological Survey.
1949. Schwartz, George M. (George Melvin), 1892-1980. Maps showing sequence of geologic units (beds) alongshore from Knife River to Two Harbors, scale 1 inch = about 1,800 feet. Minnesota Geological Survey.
1949. Schwartz, George M. (George Melvin), 1892-1980. Map of glacial (Quaternary age glacial and stream sediments) deposits of the Duluth Metropolitan Area, scale 1 inch = about 4 miles. Minnesota Geological Survey.
1949. Schwartz, George M. (George Melvin), 1892-1980. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 48 North, Range 15 West, sc... Minnesota Geological Survey.
1949. Schwartz, George M. (George Melvin), 1892-1980. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 48 North, Range 16 West, sc... Minnesota Geological Survey.