00282pam a2200121 a 4500020000500000041000500005082001300010100001800023245005100041260004100092300001100133700001600144  c  h  a577bSHU  aShuklas, S.K.  aEcology And The EnvironmenthTextual Documents  aNew DelhibCommonwealth Publications  a330/CB  aShrivastava