Columbia subject headings:
Harvard subject headings:
Brickmakers--Ems River (Germany and Netherlands)--History.
Brickmaking--Ems River (Germany and Netherlands)--History.
Brickworks--Ems River (Germany and Netherlands)--History.
Princeton subject headings:
Brickmakers--Ems River (Germany and Netherlands)--History.
Brickmaking--Ems River (Germany and Netherlands)--History.
Brickworks--Ems River (Germany and Netherlands)--History.