Columbia subject headings:
Harvard subject headings:
Clock and watch makers--England--Bedfordshire--Biography.
Clock and watch makers--England--Bedfordshire--History.
Industries--England--Bedfordshire--History.
Princeton subject headings:
Bedfordshire (England)--Biography--Dictionaries.
Clock and watch makers--England--Bedfordshire--Biography--Dictionaries.
Clock and watch making--England--Bedfordshire--History.