Columbia subject headings:
Harvard subject headings:
Geology--England--Caldbeck Fells.
Mineralogy--England--Caldbeck Fells.
Mines and mineral resources--England--Caldbeck Fells.
Princeton subject headings:
Mineralogy--England--Caldbeck Fells.
Minerals--England--Caldbeck Fells.
Mines and mineral resources--England--Caldbeck Fells.