This map data was compiled in 1997 from information available at the time, but was unpublished until until 2002; the map does not reflect any changes in data since 1997.' Includes location map and text. Scale 1:250,000. By Richard L. Powell, Samuel S. Frushour, and Denver Harper; drafted By Rea Williams Kersey.
Powell, Richard L., Frushour, Samuel S., Harper, Denver, and Kersey, Rea Williams