New York, N.Y. Bell Telephone Laboratories, Incorporated October 1950. First Separate Edition. 1-7, [1-blank] pages. 10 7/8 x 8 3/8 inches. (275 x 213 mm) Stapled wrappers, printed in grey, light blue, and black. Five holes punched at the spine as issued. A bright, clean copy. Fine. Wraps.

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