Signals : the telephone and beyond /
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
San Francisco :
W.H. Freeman,
[1981]
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| Subjects: |
| Physical Description: | viii, 181 pages : illustrations ; 25 cm. |
|---|---|
| Bibliography: | Includes bibliographical references and index. |
| ISBN: | 071671311X 0716713365 (pbk.) |