Bell System Technical Journal Volume XXXV Number 2 March 1956 , Vol 35 No 2.
American Telephone & Telegraph Co, march 1956; pp 249-534; illus, photographs, refs; charts foldouts.
American Telephone & Telegraph Co, march 1956; pp 249-534; illus, photographs, refs; charts foldouts.
Bell Telephone System technical publications, Monograph 2032, issued Jnauary 1953; 8 pages, double-column text, diagrams, references.
IRE 1949, pp 466 - 592 inclusive, plus sep. numbered adverts. at front and rear. Whole issue in original wraps, as issue.
The Institute of Radio Engineers, September 1958,pp 1571-1682 inclusive; Illustrations, Refrences.
American Telephone & Telegraph, July 1950; pp 295-468; illus, photos, references; light blue paper wraps.
American Telephone and Telegraph Co., NY 1963, pp 2501-2974 inclusive, diagrams, some photos, references.