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41. Geology of the Minneapolis-St. Paul metropolitan area, Bulletin 27, Plate 5

1936. Schwartz, George M. Structural Contour (contour lines of equal elevation that map features in the subsurface produced by rock deformation or erosion), map of the Minne...

42. Geology of the Minneapolis-St. Paul metropolitan area, Bulletin 27, Plate 6

1936. Schwartz, George M. Map of Minneapolis showing the rock surface topography (elevation of the bedrock surface), scale 1 inch = about 2,250 feet.

43. Geology of the Minneapolis-St. Paul metropolitan area, Bulletin 27, Plate 7

1936. Schwartz, George M. Map of Saint Paul showing the rock surface topography, (elevation of the bedrock surface), scale 1 inch = about 2,500 feet.

44. Map of mineral resources of Minnesota, 1954

1954. Schwartz, George M. and Prokopovich, N. Mineral resources map of Minnesota, scale 1:1,000,000.

45. Map of mineral resources of Minnesota, 1956

1956. Schwartz, George M. and Prokopovich, N. Mineral resources map of Minnesota, scale 1:1,000,000.

46. Map of mineral resources of Minnesota, 1966 (revised from 1956 edition)

1966. Schwartz, George M. and Prokopovich, N. Mineral resources map of Minnesota, scale 1:1,000,000.