1. Hydrologic and land-cover features of the Loxahatchee River basin, Florida Author/Creator: McPherson, Benjamin F. Publication/Creation: [Tallahassee, Fla.] : Dept. of the Interior, U.S. Geological Survey, 1980 Resource Type: Map Access & Availability: Loading
2. Hydrology and trophic ecology of Walden Pond, Concord, Massachusetts Author/Creator: Friesz, Paul J. Publication/Creation: Reston, VA : U.S. Dept. of the Interior, U.S. Geological Survey, [2001] Resource Type: Map Access & Availability: Loading