00373nam a2200133Ia 4500008004100000082001500041100001800056100001600074100001600090245008600106260002900192300001000221650000800231060110s9999    xx            000 0 und d  a577bDHA/F  aDHALIWAL, G S  aRALHAN, P K  aSANSHA, G S  aFundamentals of environmental sciencecBy G S Dhaliwal, Sansha G S and P K Ralhan  bKalyani Publishersc1996  a374p.  a577