Educational telecommunications /
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| Main Author: | |
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| Other Authors: | |
| Format: | Book |
| Language: | English |
| Published: |
Belmont, Calif. :
Wadsworth Pub. Co.,
c1977.
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| Subjects: |
| Physical Description: | xiii, 370 p. : ill. ; 21 cm. |
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| Bibliography: | Includes bibliographical references and indexes. |
| ISBN: | 0534004946 |