00274nam a22001097a 4500003000400000082002500004100001900029245003700048260005300085300001400138546001200152OSt  a574.095 483 bMAN/SI  aManoharan, T M  aSilent valley whispers of reason  aThiruvanthapurambKerala forest departmentc1999  axv, 419 p  aEnglish