Telephone apparatus
Subtitle: an introduction to the development and theory
By: by George Defrees Shepardson ... With one hundred and fifteen figures in the text.
Publisher: D. Appleton and company
Published: 1917
Place of publication: New York [etc.]
Language: eng
Number of pages: 337
Subjects: Telephone -- Equipment and supplies
Notes: "Books mentioned several times": p. 319-320.