000 00313nam a2200145Ia 4500
008 190201s9999 xx 000 0 und d
082 _a628
082 _bPAN
100 _a"Pandey, G N"
245 0 _aEnvironmental Engineerin
260 _aNew Delhi
260 _bVikas pub.
260 _c1997
300 _a398
999 _c37064
_d37064