Principles and practice of telephony

＜図書＞
Principles and practice of telephony

責任表示	by Jay G. Mitchell
データ種別	図書
出版情報	New York : McGraw-Hill Book Company , 1923-1924
本文言語	英語
大きさ	5 v. ; 20 cm


1	Circuit refinements and mechanical switching / by Jay G. Mitchell New York : McGraw-Hill Book Company , 1924
2	Principles and apparatus / by Jay G. Mitchell New York : McGraw-Hill Book Company , 1923