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Telephony & telegraphy A :

Smith Sydney F

Telephony & telegraphy A : an introduction to telephone and telegraph instruments and exchanges / Sydney F. Smith. - London : Oxford U.P., 1969. - xv, 285 p. illus. 25 cm.

Includes bibliographical references

Subjects--Topical Terms:
Telephone
Telegraph

LC Class. No.: TK6161

Dewey Class. No.: 621.38