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You searched for: Topic Labor Remove constraint Topic: Labor Subject Headings Bridges Design and Construction Remove constraint Subject Headings: Bridges Design and Construction Contributor University of Minnesota Duluth, Kathryn A. Martin Library, NEMHC Collections Remove constraint Contributor: University of Minnesota Duluth, Kathryn A. Martin Library, NEMHC Collections

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1. St. Louis River bridge construction, Duluth, Minnesota

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