Columbia subject headings:
Harvard subject headings:
Doggererz AG--Biography.
Doggererz AG--History.
National socialism--Germany--Blumberg (Baden-Württemberg)
Otto-Wolff-Gruppe--History.
Steel industry and trade--Political aspects--Germany--Blumberg (Baden-Württemberg)--History--20th century.
World War, 1939-1945--Germany--Equipment and supplies.
Princeton subject headings:
Doggererz AG--Biography.
Doggererz AG--History.
National socialism--Germany--Blumberg (Baden-Württemberg).
Otto-Wolff-Gruppe--History.
Steel industry and trade--Political aspects--Germany--Blumberg (Baden-Württemberg)--History--20th century.
World War, 1939-1945--Germany--Equipment and supplies.