Report of Am. Ry. Assn. committee on requisites for automatic signals used for highway crossing protection, transmission values, reflectors, circuits, code on colors for traffic signals.
Report on highway crossing protection
Ry. Signaling
Railway Signaling ; 17 , n 3
1924
3 pages
2 Figs.
Article (Journal)
English
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Report on highway crossing protection
Engineering Index Backfile | 1930
Report on highway crossing protection
Engineering Index Backfile | 1929
Engineering Index Backfile | 1915
Engineering Index Backfile | 1930
Engineering Index Backfile | 1928