Requisites for automatic gates.
Committee VIII -- Highway grade crossing protection
Assn Am Railroads -- Proc (Signal Sec)
Association of American Railroads -- Signal Section Proceedings ; 35 , n 1 ; p 157-159
1938
3 pages
Article (Journal)
English
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Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1948
Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1950
Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1946
Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1938
Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1937