Dispensing with crossing keepers; visibility of trains from crossing; warning notices and signals; etc.
Level crossings (Public roads)
Int. Ry. Congress Assn. -- Bul
International Railway Congress Association -- Bulletin ; 7 , n 2 ; p 203-236
1925
34 pages
17 Figs.
Aufsatz (Zeitschrift)
Englisch
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