Columbia subject headings:
Italo-Ethiopian War, 1935-1936.
Petroleum industry and trade.
Rubber industry and trade.
Sanctions (International law)
United States--Foreign relations.
Harvard subject headings:
Italo-Ethiopian War, 1935-1936.
Petroleum industry and trade.
Rubber industry and trade.
Sanctions (International law)
United States--Foreign relations.
Princeton subject headings:
Italo-Ethiopian War, 1935-1936.
Petroleum industry and trade.
Rubber industry and trade.
Sanctions (International law)
United States--Foreign relations.