Columbia subject headings:
Harvard subject headings:
Belgium--History--German occupation, 1914-1918.
Boden-Gesellschaft 1916--History.
Industrie-Gesellschaft 1916--History.
Stinnes, Hugo, 1870-1924
Verkehrs-Gesellschaft 1916--History.
Princeton subject headings:
Belgium--History--German occupation, 1914-1918.
Boden-Gesellschaft 1916--History.
Corporations, German--Belgium--History--20th century.
Industrie-Gesellschaft 1916--History.
Stinnes, Hugo, 1870-1924.
World War, 1914-1918--Economic aspects--Belgium.