New York, American Telephone and Telegraph Company, 1928. 8vo. In the original printed blue wrappers. In "The Bell System Technical Journal", Volume VII, Number 2, April 1928. Entire issue offered. Light discolouration to spine and previous owner's signature and stamp to front wrapper. Otherwise a fine and clean copy. Pp. 187-194. [Entire issue: Pp. 161-374.].
First printing of Waterson's paper on the differences in operating practice on the two sides of the Atlantic and plans which were worked out for taking account of them in the handling of commercial transoceanic calls.