Columbia subject headings:
Belgians--Germany.
Deportation--Belgium.
Forced labor--Germany.
Foreign workers--Recruiting--Belgium.
World War, 1914-1918--Belgium.
Harvard subject headings:
Belgians--Germany.
Deportation--Belgium.
Forced labor--Germany
Foreign workers--Recruiting--Belgium.
World War, 1914-1918--Belgium
Princeton subject headings: