Symbols for power apparatus, instruments and relays, electric traction, car-control wiring and railway signals.
Report on standards for graphical symbols used for electric traction including railway signalling
Am. Inst. Elec. Engrs. -- Report
1931
Numerous Figs.
Article (Journal)
English
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Report on standards for graphical symbols used for electric traction including railway signaling
Engineering Index Backfile | 1931
Report on standards for graphical symbols used for electric traction including railway signaling
Engineering Index Backfile | 1932
Traction symbols including railway signaling
IEEE | 1930
Railway signalling symbols. Pt I -- Schematic symbols
Engineering Index Backfile | 1951
British standard railway signalling symbols. part 1. schematic symbols
Engineering Index Backfile | 1930