000 00469nam a22001451a 4500
008
020 _a9789383746002
_c700.00
040 _aMaharaja Agrasen College - Delhi
082 _a333.707
_bSIN19
100 _aSingh, J. S.
245 _aEcology environmental science and conservation
_h[Text]
_cJ.S. Singh, S.P. Singh, S.R. Gupta
260 _bS.Chand & Company New Delhi - 55
_c2019
300 _a929p, Pb.
650 _aEnvironment
999 _c7536
_d7536