1. Hydrology and land use in Grand Traverse County, Michigan Author/Creator: Cummings, T. Ray, author Publication/Creation: Lansing, Michigan : U.S. Geological Survey, 1990 Format: Book Access & Availability: Loading
2. Assessment of ground-water contamination at Wurtsmith Air Force Base, Michigan, 1982-85 Author/Creator: Cummings, T. Ray, author Publication/Creation: Lansing, Michigan : U.S. Geological Survey, 1986 Format: Book Access & Availability: Loading
3. Estimates of dissolved and suspended substance yield of stream basins in Michigan Author/Creator: Cummings, T. Ray, author Publication/Creation: Lansing, Michigan : U.S. Geological Survey, 1984 Format: Book Access & Availability: Loading
4. Hydrology and land use in Van Buren County, Michigan Author/Creator: Cummings, T. Ray, author Publication/Creation: Lansing, Michigan : U.S. Geological Survey, 1984 Format: Book Access & Availability: Loading