1. Altitude, depth, and thickness of the Galena-Platteville bedrock unit in the subcrop area of Illinois and Wisconsin Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2000 Resource Type: Map Access & Availability: Loading
2. Bibliography of selected references on the hydrogeologic and chemical properties of the Galena-Platteville bedrock unit in Illinois and Wisconsin, 1877-1997 Author/Creator: Brown, Timothy A., author Publication/Creation: Urbana, Illinois : U.S. Geological Survey, 1997 Resource Type: Book Access & Availability: Loading