1. Nitrate and pesticides in surficial aquifers and trophic state and phosphorus sources for selected lakes, eastern Otter Tail County, west-central Minnesota, 1993-96 Author/Creator: Ruhl, J. F., author Publication/Creation: Mounds View, Minnesota : U.S. Geological Survey, 1997 Format: Book Access & Availability: Loading
2. Relation of fracture orientation to linear terrain features, anisotropic transmissivity, and seepage to streams in the karst Prairie du Chien group, southeastern Minnesota Author/Creator: Ruhl, J. F., author Publication/Creation: Mounds View, Minnesota : U.S. Geological Survey, 1995 Format: Book Access & Availability: Loading
3. Water resources of the Grand Portage Indian Reservation, northeastern Minnesota Author/Creator: Ruhl, J. F., author Publication/Creation: Mounds View, Minnesota : U.S. Geological Survey, 1995 Format: Computer File Access & Availability: Loading
4. Presence, distribution, and potential sources of nitrate and selected pesticides in the surficial aquifer along the Straight River in north-central Minnesota, 1992-93 Author/Creator: Ruhl, J. F., author Publication/Creation: Mounds View, Minnesota : U.S. Geological Survey, 1995 Format: Book Access & Availability: Loading
5. Quality of ground water around Vadnais Lake and in Lambert Creek watershed, and interaction of ground water with Vadnais Lake, Ramsey County, Minnesota Author/Creator: Ruhl, J. F., author Publication/Creation: Mounds View, Minnesota : U.S. Geological Survey, 1994 Format: Book Access & Availability: Loading
6. Water resources of the Fond du Lac Indian Reservation, east-central Minnesota Author/Creator: Ruhl, J. F., author Publication/Creation: St. Paul, Minnesota : U.S. Geological Survey, 1989 Format: Book Access & Availability: Loading
7. Water resources of the White Earth Indian Reservation, northwestern Minnesota Author/Creator: Ruhl, J. F., author Publication/Creation: St. Paul, Minnesota : U.S. Geological Survey, 1989 Format: Book Access & Availability: Loading
8. Hydrogeologic and water-quality characteristics of the Red River-Winnipeg aquifer, northwestern Minnesota Author/Creator: Ruhl, J. F., author Publication/Creation: St. Paul, Minnesota : Department of the Interior, U.S. Geological Survey, 1986 Format: Map Access & Availability: Loading