New York, American Telephone and Telegraph Company, 1925. 8vo. Volume IV, January, No. 1, 1925 of ""The Bell System Technical Journal"". Original printed blue front wrapper, back wrapper missing, spine worn. Tight and internally fine and clean. Pp. 15-25. [Entire issue: Pp. 529-185].
Reference : 43344
First publication of the paper in which Crisson proves that irregularities in telephone lines have a very important effect.
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