| Label | Dataset | Type | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | Railroads--Signaling--Centralized traffic control |
LC Subject Headings (LCSH) |
ComplexSubject ComplexType Authority |
sh85111031 | |
| Centralized traffic control (Railroads) ; CTC system (Railroads) ; Railroads--Centralized traffic control | |||||
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