000 00293nam a2200121Ia 4500
008 180721s9999 xx 000 0 und d
100 _aM.G.CHITKARA
245 0 _aENVIRONMENTAL SCIENCE
260 _b"APH PUBLISHING CORPORATION , DELHI"
260 _c2012
365 _b695.00
942 _cBK
999 _c169479
_d169479