000 00258nam a2200109Ia 4500
008 200701s1999 xx 000 0 eng d
100 _aBISWAS. N.N.
245 0 _aPRINCIPLES OF TELEGRAPHY
260 _bMEDIA PROMOTARS
_c1999
300 _a185
942 _2ddc
_cGE
999 _c1003
_d1003