New York, American Telephone and Telegraph Company, 1951. 8vo. In the original printed blue wrappers. In ""The Bell System Technical Journal."", Volume XXX, July, 1951, No. 3. The entire no. 3 offered. Wear to spine and previous owner's name to front wrapper. Otherwise fine and clean. Pp. 626-651. [Entire volume: Pp. 491-778].
Reference : 47540
First printing.
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