000 00316nam a2200133Ia 4500
008 220919s9999 xx 000 0 und d
020 _a978-93-879499-21-8
245 0 _aNCERT at your fingertip XI & XII
260 _aNA
260 _bNA
300 _aNA
650 _aPhysics, Chemistry, Biology
942 _cREF
999 _c160958
_d160958