History and aims. (Serial, 1st part) (1500 w.) (No. 62802 A)
Development of Pennsylvania railroad track inspection system
Ry Gaz, Lond
1915
Ills.
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
English track on the Pennsylvania railroad
Engineering Index Backfile | 1913
|A new Pennsylvania railroad track scale
Engineering Index Backfile | 1911
Automatic Railroad Track Inspection
Tema Archive | 1974
|Engineering Index Backfile | 1949
|Track scale with mechanical hump; Pennsylvania railroad
Engineering Index Backfile | 1911