Columbia subject headings:
Iron mines and mining--Environmental aspects--Superior, Lake.
Minnesota--Trials, litigation, etc.
Reserve Mining Company--Trials, litigation, etc.
Taconite--Environmental aspects--Superior, Lake.
United States--Trials, litigation, etc.
Water--Pollution--Law and legislation--Minnesota.
Harvard subject headings:
Iron mines and mining--Environmental aspects--Superior, Lake.
Minnesota--Trials, litigation, etc.
Reserve Mining Company--Trials, litigation, etc.
Taconite--Environmental aspects--Superior, Lake.
United States--Trials, litigation, etc.
Water--Pollution--Law and legislation--Minnesota.
Princeton subject headings: