000 00278nam a2200121Ia 4500
008 160930s9999 xx 000 0 und d
020 _a9788175418103
100 _aSatyanarayana,P
245 _aDistance Education
260 _bDelhi
_c0
300 _axii,220p.;18cm
942 _cBK
999 _c7511
_d7511