Columbia subject headings:
Harvard subject headings:
Chemical industry--Germany--Military aspects--History--20th century.
Chemical industry--Military aspects--Germany--History--20th century.
Industrial mobilization--Germany--History--20th century.
Petroleum industry and trade--Germany--Military aspects--History--20th century.
Petroleum industry and trade--Military aspects--Germany--History--20th century.
World War, 1939-1945--Equipment and supplies.
World War, 1939-1945--Germany.
Princeton subject headings:
Chemical industry--Germany--Military aspects--History--20th century.
Industrial mobilization--Germany--History--20th century.
Petroleum industry and trade--Germany--Military aspects--History--20th century.
World War, 1939-1945--Equipment and supplies.
World War, 1939-1945--Germany.