Duluth and Superior Bridge Company.
Archival Resources
| Role | Title | Holding Repository | |
|---|---|---|---|
| creatorOf | Helmes, Leslie C., 1921-2007,. Railroad bridge structural drawings, 1891-1977. | Minnesota Historical Society Library |
Bibliographic and Digital Archival Resources
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Filters:
| Relation | Name | |
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| associatedWith | Helmes, Leslie C., 1921-2007, | person |
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Corporate Body
Active 1891
Active 1977
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