Tabulation by Canadian and United States railroads of installations in following classes: automatic block, retarders and switches in yards, centralized traffic control, interlocking, highway crossing protection, spring switches; table by type of construction for years 1942 through 1952. (See also Ry Age v 134 n 2 Jan 12 1953 p 202-7)
Signal construction [midline ellipsis] 1952
Ry Signaling Communications
Railway Signaling and Communications ; 46 , n 1
1953
6 pages
Article (Journal)
English
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Signal construction [midline ellipsis] 1952
Engineering Index Backfile | 1953
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Engineering Index Backfile | 1945
"In my opinion [midline ellipsis] "
Engineering Index Backfile | 1947
Engineering Index Backfile | 1952