History and aims. (Serial, 1st part) (1500 w.) (No. 62802 A)
Development of Pennsylvania railroad track inspection system
Ry Gaz, Lond
1915
Ills.
Aufsatz (Zeitschrift)
Englisch
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English track on the Pennsylvania railroad
Engineering Index Backfile | 1913
|A new Pennsylvania railroad track scale
Engineering Index Backfile | 1911
Track scale with mechanical hump; Pennsylvania railroad
Engineering Index Backfile | 1911
Engineering Index Backfile | 1949
|Automatic Railroad Track Inspection
Tema Archiv | 1974
|