000 00318nam a2200133Ia 4500
008 160122s9999 xx 000 0 und d
041 _aEnglish
100 _aB K Sharma
245 3 _aAn Introduction to Environmental Pollution
250 _a1st
260 _bMeerut:krishna pub
_c1997
300 _a512p.
650 _aEVS
999 _c124
_d124