Discussion of various services for railroad operation in use in Pennsylvania's private communication plant and network, including telegraph, telephone, radio, teletype, facsimile, public address, radar, ship to shore radiotelephone, inductive train and yard telephones and other systems.
Communication services and improvements on Pennsylvania railroad
Telegraph Telephone Age
Telegraph and Telephone Age ; n 12
1948
Aufsatz (Zeitschrift)
Englisch
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Improvements on the Pennsylvania railroad
Engineering Index Backfile | 1903
|Improvements on the Pennsylvania railroad
Engineering Index Backfile | 1901
Alignment improvements on the Pennsylvania railroad
Engineering Index Backfile | 1896
Pennsylvania Railroad terminal improvements in Jersey City
Engineering Index Backfile | 1890
Engineering Index Backfile | 1909