Columbia subject headings:
Harvard subject headings:
Geology--Appalachian Region, Southern--Guidebooks.
Geology--Tennessee--Guidebooks.
Geology--Virginia--Guidebooks.
Mines and mineral resources--Appalachian Region, Southern--Guidebooks.
Mines and mineral resources--Tennessee--Guidebooks.
Mines and mineral resources--Virginia--Guidebooks.
Princeton subject headings:
Geology--Appalachian Region, Southern--Guidebooks.
Geology--Tennessee--Guidebooks.
Geology--Virginia--Guidebooks.
Mines and mineral resources--Appalachian Region, Southern--Guidebooks.
Mines and mineral resources--Tennessee--Guidebooks.
Mines and mineral resources--Virginia--Guidebooks.