Data on replacements in maintained tracks, prepared by Bureau of Railway Economics.
Table tells partial story of tie renewals in 1939
Ry Age
Railway Age ; 108 , n 23
1940
3 pages
Aufsatz (Zeitschrift)
Englisch
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Table tells story of tie renewals during depression
Engineering Index Backfile | 1936
Engineering Index Backfile | 1941
Engineering Index Backfile | 1938
Engineering Index Backfile | 1938
Engineering Index Backfile | 1937