000 00248nam a2200109Ia 4500
008 220201s1999 xx 000 0 eng d
100 _aSINHA, UMESH
245 0 _aTELEPHONY
260 _aDELHI
_bSATYA PRAKASHAN
_c1999
300 _a264
942 _2ddc
999 _c67910
_d67910