00965nam a2200289 i 4500 0 0 ddc 0 0 NFIC ASL ASL GEN 2021-01-25 Donated by Prof. S. M. H. Kabir 0 621.3841 SMT 104882 2021-01-25 00:00:00 C-1 2021-01-25 BK 21196 21196 3216006 BDDh-ASL 20231015025957.0 781114s1978 enka 001 0 eng 78318256 GB*** 0198593589 : $16.50. 0198593570 DLC DLC DLC BDDh-ASL TK6161 .S6 1978 621.3841 SMT Smith, Sydney F. Telephony and telegraphy : an introduction to instruments and switching systems (electromechanical and reed-electronic) / by Sydney F. Smith. 3d ed. Oxford ; New York : Oxford University Press, 1978. xiv, 278 p. : ill. ; 26 cm. First ed. published in 1969 under title: Telephony & telegraphy A. Includes index. Telephone. Telegraph. 7 cbc orignew 4 ncip 19 y-gencatlg ddc BK