Telephone, telegraph and wireless systems in Philadelphia : presented to the schools of Philadelphia by the Bell Telephone Company of Pennsylvania
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Corporate Author: | |
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Format: | Book |
Language: | English |
Published: |
[Philadelphia :
Philadelphia Chamber of Commerce,
c1917]
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Series: | Educational pamphlet (Philadelphia Chamber of Commerce. Educational Committee) ;
no. 9. |
Subjects and Genres: | |
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Physical Description: |
17 p. : ill., ports. ; 23 cm. |
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