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21. Geologic atlas of Washington County, Minnesota, C-5, Plate 6, Pollution Sensitivity

1990. Balaban, N.H. and Meyer, Gary N. Map showing the susceptibility of the ground water system (bedrock and unconsolidated sediment aquifers) to contamination, scale 1:100,000, Washing...

22. Geologic atlas of Washington County, Minnesota, C-5, Plate 7, Well Construction

1990. Balaban, N.H. and Olsen, Bruce M. 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...

23. Geologic maps of the Late Cretaceous rocks, southwestern Minnesota, M-69, Plate 1

1990. Setterholm, Dale R. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Cretaceous age rocks, southwestern M...

24. Geologic maps of the Late Cretaceous rocks, southwestern Minnesota, M-69, Plate2

1990. Setterholm, Dale R. Bedrock topography (elevation of the bedrock surface) of the sub-Cretaceous surface; Bedrock topography of the sub-Quaternary surface; Isopachs (th...

25. Indianapolis.

1990. Blue line print.; Shows major roads and highways.; Annotated by stuck-on-lettering indicating recreational points of interest, such as parks, museu...

26. Southeast Asia: strategic straits and maritime claims, 1990

1990. Central Intelligence Agency. This is a map of Southeast Asian marine claims. The map was created by the Central Intelligence Agency. Central Intelligence Agency.

27. The Caribbean, 1990

1990. Central Intelligence Agency. This is a map of the Caribbean, shown at a 1:18,000,000 scale. The map was created by the Central Intelligence Agency. Central Intelligence Agency.