Western electric company relays
Subtitle: (with the exception of nos. 221-5 step-by-step relays) installed by the Installation department
By: [by] W. Willenbruch and I.J. Greenslade
Publisher: Western Electric Company, Installation Department
Published: 1928
Place of publication: New York]
Language: eng
Number of pages: 40
Notes: Cover-title.

"Issued by General installation engineer, December, 1926 ... Reprinted December, 1928."