Columbia subject headings:
Rhine Province (Germany)--Economic conditions--Sources.
Rhine Province (Germany)--Politics and government--Sources.
Rhine Province (Germany)--Social conditions--Sources.
Westphalia (Germany)--Economic conditions--Sources.
Westphalia (Germany)--Politics and government--Sources.
Westphalia (Germany)--Social conditions--Sources.
Harvard subject headings:
Rhine Province (Germany)--Economic conditions--Sources.
Rhine Province (Germany)--Politics and government--Sources.
Rhine Province (Germany)--Social conditions--Sources.
Westphalia (Germany)--Economic conditions--Sources.
Westphalia (Germany)--Politics and government--Sources.
Westphalia (Germany)--Social conditions--Sources.
Princeton subject headings:
Rhine Province (Germany)--Economic conditions--Sources.
Rhine Province (Germany)--Politics and government--Sources.
Rhine Province (Germany)--Social conditions--Sources.
Westphalia (Germany)--Economic conditions--Sources.
Westphalia (Germany)--Politics and government--Sources.
Westphalia (Germany)--Social conditions--Sources.