1. Aerial gamma-ray maps of regional surface concentrations of potassium, uranium, and thorium in West Virginia Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by U.S. Geological Survey, Information Services Resource Type: Map Access & Availability: Loading
2. Ayersville quadrangle, Georgia, 1964, photorevised 1985 : 7.5 minute series (topographic) Author/Creator: Geological Survey (U.S.) Publication/Creation: Reston, Va. : The Survey : For sale by the Survey, 1986 Resource Type: Map Access & Availability: Loading