Bell telephone magazine [microform].
American Telephone and Telegraph Company.
American Telephone and Telegraph Company.Information Department.
New York : American Telephone and Telegraph Co.,
1941-1983.
Microfilm.
Vols. for 1941- issued by the Information Dept., American Telephone and Telegraph Co.;  by the American Telephone and Telegraph Co.
Vol. 1 (1922)-v. 25 (1946/47) on Reel 1 of previous title (includes index to earlier vols.) ; Vols. 36-45, 1957-66.  1 v.
Telephone
Bell telephone quarterly