Bell System Technical Journal volume XXXVII Number 5 september 1958; vol 37 no 5.
American Telephone & Telegraph Co, 1958; i-vi, pp 1091-1326, illus, photos, references.
American Telephone & Telegraph Co, 1958; i-vi, pp 1091-1326, illus, photos, references.
American Telephone & Telegraph Co, november 1958, pp 1327-1672; illus, photographs, references.
Interscience Publishers, NY 1960 first edition; 686 pages, some illustrations and photographs; index.
Interscience Publishers, NY 1958, first edition; 972 pages, photographs, Index, tables etc.