Cornell University Library Digital Collections
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Subject
- Bridges (built works)3
- Duluth, Missabe, and Iron Range Railway45
- Industries (organizations)44
- Iron Ore[remove]45
- Locomotive firemen5
- Locomotives31
- Mines and mineral resources45
- Pit Mine11
- Railroad cars38
- Railroad crossings1
- Railroad switches10
- Railroad tracks37
- Railroad yards1
- Railroads--Buildings and structures12
- Railroads--Employees12
- Railroads--Equipment and supplies1
- Railroads--Freight36
- Railroads--Signaling18
- Shipping5
- Viaducts25