作者:
for students of science;&;engineering.;Duff, Alexander Wilmer,;Lewis, Exum Percival,;Jenkins, Francis Arthur,;Mendenhall, Charles Elwood,;Stephenson, Reginald Joseph,;Ingersoll, Leonard Rose,
作者:
a comprehensive and detailed exposition of the theory and practice of the telephone art /;McMeen, Samuel Groenendyke,;Miller, Kempster Blanchard,;American Technical Society.