Columbia subject headings:
Algoma Steel Corporation,
International rivers.
Michigan northern power company.
Sault Sainte Marie canal.
St. Marys River.
Harvard subject headings:
Algoma Steel Corporation, limited.
International rivers.
Michigan Northern Power Company.
Saint Marys River (Mich. and Ont.)
Sault Sainte Marie Canal (Mich.)
Water-power--St. Marys River (Mich. and Ont.)
Princeton subject headings: