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A system of multiplex telephony by the use of vacuum tubes
Title
A system of multiplex telephony by the use of vacuum tubes
Creator
Arnold, E. H., Throop, A. R.
Date
2009, 1919
Publisher
Armour Institute of Technology
Description
http://www.archive.org/details/systemofmultiple00arno
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaves 44-45