The Bell System Technical Journal September 1978 vol 57 no 7 pt 2, individual issue.
AT&T 1978 pp 2575-2767 inclusive, diagrams, references.
AT&T 1978 pp 2575-2767 inclusive, diagrams, references.
AT&T 1978, pp 479-795 inclusive, diagrams, references.
AT&T 1978, pp 1231-1715 inclusive, diagrams, photographs, references.
AT&T BSTJ, pp. 2417 - 3019 inclusive, references, diagrams.
AT&T BSTJ, pp 1 - 206 inclusive, diagrams, references.
AT&T BSTJ 1958, diagrams, references; three individual issues.
AT&T, pp 1609 - 1994 inclusive, references, diagrams, photographs.
AT&T, pp in three hardcover volumes, 1964, reprinted throughout the 1970s, 2nd printing 1980;.
AT&T 1969, pp. 2607-2908 inclusive, references, diagrams, photographs.
AT&T 1978, pp 221-477 inclusive, references, diagrams, photographs.
AT&T 1970, pp 159-320, references, diagrams, photographs.
Saturday Magazine, No. 552 -- February 6, 1841.
MIT Press, 1988, 368 pages, index, some diagrams.
Bell Telephone System Technical Publications, BT Labs NY, n.d. [1936?); Monograph B-868; 64 pages.
AT&T, BSTJ, pp 1319-1513 inclusive, photographs, diagrams, references.
American Telephone & Telegraph Company, Engineering Director Data Communications, 1964 and 1967, 21 pages and 10 pages, double-column text, illustrations and some photographs.
AT&T 1952 var. pagination, diagrams, references, photographs.
AT& 1959, pp. 1 - 304 inclusive, references, diagrams, photographs.
AT&T 1956; pp 1 - 245 inclusive; photographs, diagrams; references.
American Telephone & Telegraph Co, Jan. 1957; pp 1-348; illus, photos, references.
American Telephone & Telegraph Co, 1958; i-vi, pp 1091-1326, illus, photos, references.
American Telephone & Telegraph Co, NY, n.d., ca. 1941 and 1952; 48 pages and 32 pages.
American Telephone & Telegraph, April 1978; pp 797-1230 inclusive.
American Telephone & Telegraph, June 1942; pp 1-79 inclusive.