The 2020 NSS Convention Geology Field Trip, North Fork of the South Branch of the Potomac River
The 2020 NSS Convention Geology Field Trip, North Fork of the South Branch of the Potomac River, by George Dasher; 84 pages, 66 photos, ten maps, 21 geological schematics; color; describes a geology field trip from Elkins to Germany Valley, with the primary stops at Bowden, Smoke Hole Caverns, Hellhole, and Seneca Caverns. Color.
 "The 2020 NSS Convention Geology Field Trip, North Fork of the South Branch of the Potomac River")
