000 00331nam a2200145Ia 4500
008 220926s9999 xx 000 0 und d
100 _aP.S.Verma
245 0 _aEnvironmental Biology
250 _a2nd RP
260 _aNew Delhi
260 _bS.Chand & Company
260 _c1996
650 _aEnvironmental Biology
942 _cBK
999 _c9976
_d9976