Available Indexes

Telephone circuits;
their design and operation. Correspondence course, number one. I.B.T. Chicago Plant Department, Educational Division.

Description

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Corporate Author: Illinois Bell Telephone Company.
Language(s): English
Published: 1924-1925]
Note: Copyright dates 1920-1924.
Typewritten copy.
Physical Description: 17 nos. in 1 vol. illus., diagrs. 22 x 28 cm.
Locate a Print Version: Find in a library

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