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1989
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11. Geologic atlas of Hennepin County, Minnesota, C-4, Plate 7, Pollution Sensitivity
1989. Balaban, N.H. and Piegat, James. Map showing the susceptibility of the ground water system (bedrock and unconsolidated sediment aquifers) to contamination, scale 1:100,000.
12. Geologic atlas of Hennepin County, Minnesota, C-4, Plate 8, Well Construction
1989. Balaban, N.H., Olsen, Bruce M., and Bloomgren, Bruce A. Map showing requirements of well construction practices and regulations as they relate to geology and location of a well on the land surface and su...
13. Geologic atlas of Hennepin County, Minnesota, C-4, Plate 9, Geologic Resources
1989. Balaban, N.H. and Mossler, John H. Maps showing locations and types of bedrock aggregate and sand and gravel resources, scale 1:100,000, Hennepin County.
14. Geologic map of the Illgen City quadrangle, Lake County, Minnesota, M-66
1989. Miller, James D., Jr., Green, John C., and Boerboom, Terrence J. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Illgen City quadrangle, scale 1:...
15. Welcome Mountain: Antarctica
1989. Stump. Projection: Lambert Conformal Conic Projection: Standard Parallels -72°40' and -75°20'; Series: USGS 1:250,000 Geologic Reconnaissance Series.