Telephones.
By: Illustrated by Joseph Low
Contributors: Low, Joseph, 1911-
Series: Science is what and why
Publisher: Coward-McCann
Published: 1967
Place of publication: New York
Language: eng
Number of pages: 46
Subjects: Telephone
Description: Explains how a telephone transmits voices, explaining also basic aspects of speech and hearing, and covers different kinds of phones and dialing numbers