Columbia subject headings:
Historic buildings--Michigan--Sault Sainte Marie.
Hydroelectric power plants--Michigan--Sault Sainte Marie.
Sault Sainte Marie (Mich.)--Buildings, structures, etc.
Harvard subject headings:
Buildings--Michigan--Sault Sainte Marie.
Historic buildings--Michigan--Sault Sainte Marie.
Historic buildings--Michigan.
Hydroelectric power plants--Michigan--Sault Sainte Marie.
Sault Sainte Marie (Mich.)--Buildings, structures, etc.
Princeton subject headings:
Historic buildings--Michigan--Sault Sainte Marie.
Hydroelectric power plants--Michigan--Sault Sainte Marie.
Sault Sainte Marie (Mich.)--Buildings, structures, etc.