Study on automatic manual and non-operative signals for highway crossing protection; signals in lieu of gates; red lantern for flagmen. Abstract of report to Am. Ry. Eng. Assn.
Report on signals and interlocking
Ry. Age
Railway Age ; 84 , n 9C
1928
Article (Journal)
English
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Report on signals and interlocking
Engineering Index Backfile | 1930
Report on signals and interlocking
Engineering Index Backfile | 1930
Report on signals and interlocking
Engineering Index Backfile | 1929
Report on signals and interlocking
Engineering Index Backfile | 1931
Report on signals and interlocking
Engineering Index Backfile | 1925