Columbia subject headings:
Coal miners--England--Nottinghamshire--History--20th century.
Coal mines and mining--England--Nottinghamshire--History--20th century.
Nottinghamshire (England)--Economic conditions.
Nottinghamshire (England)--Social conditions.
Harvard subject headings:
Coal miners--England--Nottinghamshire--History--20th century.
Coal mines and mining--England--Nottinghamshire--History--20th century.
Nottinghamshire (England)--Economic conditions.
Nottinghamshire (England)--Social conditions.
Princeton subject headings:
Coal miners--England--Nottinghamshire--History--20th century.
Coal mines and mining--England--Nottinghamshire--History--20th century.
Nottinghamshire (England)--Economic conditions.
Nottinghamshire (England)--Social conditions.