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22. Quaternary geologic map of the Sudbury 4° x 6° quadrangle, United States and Canada
23. Quaternary geologic map of the Wichita 4° x 6° quadrangle, United States
24. Quality of freshwater in aquifers of Louisiana, 1988
25. Quaternary geologic map of the Hudson River 4° x 6° quadrangle, United States and Canada
26. Quaternary geologic map of the Blue Ridge 4° x 6° quadrangle, United States
27. Quaternary geologic map of the Boston 4° x 6° quadrangle, United States and Canada
28. Quaternary geologic map of the Des Moines 4° x 6° quadrangle, United States
29. Quaternary geologic map of the Louisville 4° x 6° quadrangle, United States
30. Quality of water resources of the Ouachita National Forest, Arkansas
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