000 nam a22 7a 4500
999 _c25070
_d25070
003 OSt
020 _a9788123719863
041 _aHindi
082 _aHS
_bGUPT
100 _aGupta, Arvind
245 _aPed
250 _a1st
260 _aNew Delhi
_bNational book trust
_c2017
300 _a63p; paperback
650 _aHindi Science
942 _2ddc
_cBK