1. Construction of digital bathymetry for the Gulf of Maine Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, Va.] : The Survey ; [Denver, Colo.] : [USGS Information Services], 1999 Resource Type: Map Access & Availability: Loading
2. Geologic map of the Barrymore quadrangle (V-59), Venus Author/Creator: Johnson, Jeffrey R., cartographer Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 1999 Resource Type: Map Access & Availability: Loading