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- catalog contributor b9633370.
- catalog created "1931.".
- catalog date "1931".
- catalog date "1931.".
- catalog dateCopyrighted "1931.".
- catalog description ""References" at end of each chapter.".
- catalog description "Thesis (Ph. D.)--University of Pennsylvania, 1931.".
- catalog extent "99p.".
- catalog issued "1931".
- catalog issued "1931.".
- catalog language "eng".
- catalog publisher "Philadelphia,".
- catalog spatial "United States.".
- catalog subject "Railroads Electrification.".
- catalog subject "Railroads United States.".
- catalog subject "TF858.A4 W6 1931".
- catalog title "Economic problems and results of electrification of steam railroadsin the United States, [by] Yun Yuan Wong.".
- catalog type "text".