Communication services required for operation of Pennsylvania Railroad and for convenience of its patrons; company-owned outside plant required to provide service; tabulations showing magnitude of some classes of business handled and plant involved. (See also - discussion p 294-5)
Communication system on Pennsylvania railroad
Am Inst Elec Engrs -- Trans
American Institute of Electrical Engineers -- Transactions ; 52 , n 1 ; p 288-294
1933
7 pages
Aufsatz (Zeitschrift)
Englisch
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