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|Additional Physical Format:||Online version:
General Railway Signal Company.
Electric interlocking handbook.
Rochester, N.Y., General railway signal company, 1913
|All Authors / Contributors:||
Henry Muhlenberg Sperry; Paul Epler Carter; General Railway Signal Company.
|Description:||3 preliminary leaves, -435 pages frontispiece, illustrations, tables, diagrams 18 cm|
|Responsibility:||by the Engineering staff of the General railway signal company, with an introduction by Wilmer W. Salmon. Henry M. Sperry, editor; Paul E. Carter, assistant editor; Sherman A. Benedict, illustrator.|