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Knox College Railroads in the Midwest: Early Documents and Images (Knox College)
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Chicago, Burlington & ... (3)
Railroad Employees (3)
Railroad Signal Towers (2)
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Railroad Towers (1)
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Block signal: working in tower
1. Block signal: working in tower
Block signal: working outside
2. Block signal: working outside
Operator mannig telephone in interlocking tower
3. Operator mannig telephone in interlocking tower
 
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