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Centralized Traffic Control
Type H, Class M, Coded System
Handbook 20
General Railway Signal Company
Rochester New York
Copyright – October 1941
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G-R-S Coded Cab Signals
Bulletin 171
General Railway Signal Company
Rochester New York
Copyright – October 1937
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G-R-S Automatic Train Control
Intermittent Inductive Auto Manual Type
Pamphlet No. B 526
Third Edition
General Railway Signal Company
Rochester New York
Copyright – December 1927
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G-R-S Automatic Train Control
Intermittent Inductive Auto-Manual System
Installation Maintenance and Catalog
Handbook Number 6
Second Edition
General Railway Signal Company
Rochester New York
Copyright – January 1928
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Speed and Simplicity in Train Directing
First NX – eNtrance eXit – Interlocking in U.S.A.
GRS Bulletin 172
General Railway Signal Company
Rochester New York
Copyright – November 1937
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Centralized Traffic Control
Bulletin 169
General Railway Signal Company
Rochester New York
Copyright – March 1938
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Catalogue of Interlocking and Signaling Devices
1902
Sections 16 – 17
Indicators, Annunciators, Insulators, Track Drilling Machines, Trunking, Etc.
The Union Switch & Signal Co.
Swissvale Pennsylvania
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The Edison Storage Battery for Railway Signals
General Information and Instructions
Bulletin 104 X
Edison Storage Battery Company
Orange New Jersey
Copyright – November 1915
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The Edison Storage Battery for Railway Signals
General Information and Instructions
Edison Storage Battery Company
Orange New Jersey
Copyright -1913
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