Gillies, D. C., Lapham, W. W., United States. National Park Service., Geological Survey (U.S.). (1980). Reassessment of the effects of construction dewatering on ground-water levels in the Cowles Unit, Indiana Dunes National Lakeshore, Indiana. [Reston, Va.?]: U.S. Geological Survey.MLA Citation
Gillies, Daniel C, Wayne W Lapham, United States. National Park Service, and Geological Survey (U.S.). Reassessment of the Effects of Construction Dewatering On Ground-water Levels In the Cowles Unit, Indiana Dunes National Lakeshore, Indiana. [Reston, Va.?]: U.S. Geological Survey, 1980.
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