Shallow ground-water flow and drainage characteristics of the Brown Ditch basin near the East Unit, Indiana Dunes National Lakeshore, Indiana, 1982 / by Robert J. Shedlock and William E. Harkness ; prepared in cooperation with the National Park Service (Water-resources investigations report ; 83-4271)
Shallow ground-water flow and drainage characteristics of the Brown Ditch basin near the East Unit, Indiana Dunes National Lakeshore, Indiana, 1982 / by Robert J. Shedlock and William E. Harkness ; prepared in cooperation with the National Park Service