000 00339nam a2200145Ia 4500
008 220926s9999 xx 000 0 und d
100 _aP.S.Verma&V.K. Agarwal
245 0 _aConcept of Ecology
250 _a1st Ed
260 _aNew Delhi
260 _bS.Chandd&Company
260 _c1998
650 _aConcept of Ecology
942 _cBK
999 _c18217
_d18217