Columbia subject headings:
Chalk--England--Kent.
Chalk--England--Sussex.
Geology--England--Kent--Guidebooks.
Geology--England--Sussex--Guidebooks.
Harvard subject headings:
Princeton subject headings:
Chalk--England--Kent--Guidebooks.
Chalk--England--Sussex--Guidebooks.
Geology--England--Kent--Guidebooks.
Geology--England--Sussex--Guidebooks.