1. The Helen Planitia region of Venus in four map sheets Author/Creator: Geological Survey (U.S.), issuing body Publication/Creation: Denver, Colorado : For sale by USGS Information Services Format: Map Access & Availability: Loading
2. High-resolution marine geologic maps showing sediment distribution on the insular shelf off Luquillo, Puerto Rico Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Format: Map Access & Availability: Loading
3. A hydrologic description of Keystone Lake near Tampa, Florida Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : Department of the Interior, United States Geological Survey, 1977 Format: Map Access & Availability: Loading
4. Hydrology of Lake Panasoffkee, Sumter County, Florida Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : Department of the Interior, United States Geological Survey, 1977 Format: Map Access & Availability: Loading