000 00304nam a2200121Ia 4500
008 220201s1994 xx 000 0 eng d
041 _aENG
100 _aBISWAS, N N
245 0 _aPRINCIPLES OF TELEGRAPHY
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1994
300 _a185
942 _2ddc
999 _c60435
_d60435