Columbia subject headings:
Caves.
Natural history--England--Somerset.
Somerset (England)--Antiquities.
Somerset (England)--Description and travel.
Harvard subject headings:
Caves
Caves--England--Somerset.
Natural history--England--Somerset.
Somerset (England)--Antiquities.
Somerset (England)--Description and travel.
Princeton subject headings:
Caves.
Natural history--England--Somerset.
Somerset (England)--Antiquities.
Somerset (England)--Description and travel.