Maps, illustrated description of points where the most important betterments are being made (1000 w.)
Track improvements on the Baltimore and Ohio
Ry Age
1902
Aufsatz (Zeitschrift)
Englisch
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Baltimore and Ohio improvements
Engineering Index Backfile | 1896
Baltimore and Ohio mountain division improvements
Engineering Index Backfile | 1911
Railroad track standards on the Baltimore and Ohio
Engineering Index Backfile | 1891
Track inspection car of the Baltimore and Ohio
Engineering Index Backfile | 1906
SLUB | 2000
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