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Bridges, viaducts, and underpasses: 18th St. Bridge 5 (Folder 53)
Bridges, viaducts and underpasses included: 18th St. Bridge 5 (1966)
1966

Bridges, viaducts, and underpasses: 18th St. Bridge 5 (Folder 54)
Bridges, viaducts and underpasses included: 18th St. Bridge 5 (1966)
1966


General Electric engineer demonstrating electrical science and research
General Electric engineer demonstrates and explains electrical science and research.
1933