The Bell System Technical Journal volume 54 no. 8, October 1975.
AT&T BSTJ, pp. 1355 - 1505 inclusive, diagrams, references.
AT&T BSTJ, pp. 1355 - 1505 inclusive, diagrams, references.
American Telephone & Telegraph, NY 1932; complete separate January issue; 196 pages.
BSTJ, American Telephone and Telegraph Co, NY 1940; vol IX no. 1, January 1940; whole issue, blue paper wraps, pp 1 - 160 inclusive; photographs, illustrations, references.
BSTJ issued December 1959, printed inside rear cover; published in BSTJ November 1959; 30 pages, diagrams, references.