00323nam a2200121Ia 4500008004100000040001700041041001200058082001700070100001700087245003500104260005000139300001200189230917s9999||||xx |||||||||||||| ||und||  e104332aMAIN  aEnglish  a333.72 T739N  aTrivedi, P R 0aNatural resources conservation  aNew DelhibA P H Publishing Corporationc2004  a213p p.