Machine switching
By: by W. H. Freedman
Series: [International textbook company. Bluebooks] 166B; International Textbook Company Bluebooks -- 166B
Publisher: International textbook company
Published: 1924
Place of publication: Scranton, Pa
Language: eng
Number of pages: 106
Subjects: Telephone switchboards
Table of contents: title: Contents.-Pt. 1-3. Machine switching.