1. Use of frequency-volume analyses to estimate regionalized yields and loads of sediment, phosphorus, and polychlorinated biphenyls to lakes Michigan and Superior Author/Creator: Robertson, Dale M., author Publication/Creation: Madison, Wisconsin : U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading
2. Use of isotopes to identify sources of ground water, estimate ground-water-flow rates, and assess aquifer vulnerability in the Calumet Region of northwestern Indiana and northeastern Illinois Author/Creator: Kay, Robert T. Publication/Creation: Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor]. Resource Type: Book Access & Availability: Loading