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- catalog alternative "Electric journal.".
- catalog created "1908.".
- catalog date "1908".
- catalog date "1908.".
- catalog dateCopyrighted "1908.".
- catalog extent "108 p.".
- catalog issued "1908".
- catalog issued "1908.".
- catalog language "eng".
- catalog publisher "Pittsburg, Pa., The Electric journal,".
- catalog subject "Railroads Signaling.".
- catalog subject "TF615 .E3".
- catalog title "Railway signaling; a comprehensive treatise on modern methods of railway signaling, covering principles of operation and types of apparatus; written by a staff of expert signal engineers.".
- catalog type "text".