The Bell telephone system /
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
New York, London :
Harper & brothers,
1941.
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| Subjects: |
| Item Description: | Numbers vi and vii omitted in paging. "First edition." |
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| Physical Description: | ix (i. e. vii) 248 pages including illustrations (maps) tables, diagrams ; 22cm. |