000 00310nam a2200133Ia 4500
008 230601s9999 xx 000 0 und d
100 _aSharma, Khemraj
245 0 _aParyavaran Adhyayan Shikshan
250 _a2nd
260 _bAgrawal Pub.
_aAgra
_c2010
300 _a463
650 _aEducation
942 _cREF
999 _c8654
_d8654