00953nam a2200289 i 4500 13742 BD-RjUL 20211208235514.0 140201s1978 enka 001 0 eng 0198593589 0198593570 (pbk) (BD-RjUL)13794 DLC DLC BD-RjUL eng eng 621.3841 SMT 1978 Smith, Sydney F. 42998 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, c1978. xiv, 278 p. : ill. ; 26 cm. First ed. published in 1969 under title: Telephony & telegraphy A. Includes index. Telephone. 42999 Telegraph. 43000 ddc BK 13742 13742 0 0 ddc 0 1 NFIC RUCL RUCL Reading 1980-02-29 Heffers and sons 3.50 0 621.3841 SMT 1978 2014-02-01 00:00:00 C-1 2014-02-01 BK 0 0 ddc 0 0 NFIC RUCL RUCL Stack 1980-02-29 Heffers 3.50 0 621.3841 SMT 1978 2017-05-30 00:00:00 C-2 2017-05-30 BK