Lake Superior region  search
BTNorth America
 .Lake Superior region
UFLake Superior Basin
RTOntario
 Wisconsin
 Minnesota
 Michigan
 Lake Superior
 Great Lakes region
 Lake Algonquin
 Southern Province
SNTerm reintroduced in 1985. Also search Lake Superior. Not a valid term from 1972-1984. Indexed with Lake Superior, Ontario and states as applicable. Added to Thesaurus in 1985.