000 00280nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aC.P.Kaushik & Anubha Koshik
245 0 _aPesspective in Enviroument of Studies
250 _a2nd
260 _aN.D
_bNew Age
_c2006
942 _cBK
999 _c12351
_d12351