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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Hlavní autor: Wong, Yun Yuan (Autor)
Typ dokumentu: Kniha
Jazyk:Angličtina
Vydáno: Philadelphia : [s.n.], 1931
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Fyzický popis:99 s.