AT&T, issued October 1953, orig. published in The Bell System Technical Journal, vol 32, March 1953; 24 pages plus rear foldout chart.
Condition: Very Good, 8.5x11 blue and gray heavy paper covers, three-hole-punched at margin, imprint of electric company on lower front corner. This is one of the larger-sized Monograph series of the Bell Telephone System technical publications. Binding is sound and secure, pages clean, unmarked.
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