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- 17029376 alternative "Block telegraph and electric locking signals.".
- 17029376 alternative "Patent train signalling telegraphs.".
- 17029376 alternative "Tyer's block telegraph and electric locking signals.".
- 17029376 contributor B567723.
- 17029376 created "1874?]".
- 17029376 date "1874".
- 17029376 date "1874?]".
- 17029376 dateCopyrighted "1874?]".
- 17029376 extent "101 p.".
- 17029376 issued "1874".
- 17029376 issued "1874?]".
- 17029376 language "eng".
- 17029376 publisher "[London, Printed by Alabaster & Passmore,".
- 17029376 subject "Railroads Signaling Block system.".
- 17029376 subject "TF630 .T9".
- 17029376 title "Tyer's patent train signalling telegraphs. [By] Tyer & company ...".
- 17029376 type "text".