Economic problems and results of electrification of steam railroads in the United States : a thesis in economics presented to the Faculty of the Graduate School of the University of Pennsylvania in partial fulfillment of the requirements for the degree of Doctor of Philosophy /
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Typ dokumentu: | Kniha |
Jazyk: | Angličtina |
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Philadelphia :
[s.n.],
1931
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Témata: |
Fyzický popis: | 99 s. |
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