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1. Magnetite deposits of northeastern Mesabi range, Minnesota, Bulletin 17, Plate 1

1919. Grout, Frank F. and Broderick, T.M. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Eastern Mesabi District, Minneso...

2. Peat deposits of Minnesota, Bulletin 16, Plate 1

1919. Soper, E.K. Peat Deposits of Northern Minnesota.

3. Peat deposits of Minnesota, Bulletin 16, Plate 2

1919. Soper, E.K. Peat Deposits of Beltrami County, Minnesota, showing location of soundings and depth of peat and topography of the surface of the bogs north of Red...

4. Peat deposits of Minnesota, Bulletin 16, Plate 3

1919. Soper, E.K. Peat Deposits of Koochiching County Minnesota, showing locations of drainage ditches, scale 1 inch = about 4 miles.

5. Peat deposits of Minnesota, Bulletin 16, Plate 4

1919. Soper, E.K. Map showing Peat Deposits of Itasca County Minnesota, scale 1 inch = about 4 miles.

6. Surface formations and agricultural conditions of the southern half of Minnesota, Bulletin 14, Plate 1

1919. Leverett, Frank. and Sardeson, Frederik W. Sheet 3, Map of the Surface (glacial landforms) Formations and agricultural conditions of the southern half of Minnesota, scale 1:500,000.