00281cam a2200109ua 4500041001000000082001600010100002200026245006400048260004200112300001200154504000500166  aengh  a628bMAN/EN  aManjunath, D L  .  aEnvironmental studies / cD L Manjunath.hTextual Documents  a : bPearson Education Asia , c2007.  a203 ; .  a