Bulletin 24 -- The Caves and Karst of Western Greenbrier County
Bulletin #24: The Caves and Karst of Western Greenbrier County, by Bill Balfour, Greg Springer, Mark Passerby, and George Dasher; June 2020. 248 pages, 184 caves and springs, 41 caves maps, 24 geological schematics and other maps, 138 photos, nine appendices, and a 58-page quad map of Zicafoose Blowhole.
 "Bulletin 24 -- The Caves and Karst of Western Greenbrier County")
