Columbia subject headings:
Investments, Foreign--Canada, Western--History--Bibliography.
Investments, Foreign--Canada, Western--History--Sources.
Investments, Foreign--West (U.S.)--History--Bibliography.
Investments, Foreign--West (U.S.)--History--Sources.
Harvard subject headings:
Investments, Foreign--Canada, Western--History--Bibliography.
Investments, Foreign--Canada, Western--History--Sources.
Investments, Foreign--West (U.S.)--History--Bibliography.
Investments, Foreign--West (U.S.)--History--Sources.
Princeton subject headings:
Investments, Foreign--Canada, Western--History--Bibliography.
Investments, Foreign--Canada, Western--History--Sources.
Investments, Foreign--West (U.S.)--History--Bibliography.
Investments, Foreign--West (U.S.)--History--Sources.