00293nam a2200109Ia 4500041001200000082000800012082001100020100002100031245006500052260004300117650002300160  aEnglish  a633  bPUR/TR  aWhyte Robert Orr  aTropical grazing lands : Communities and constituent species  aThe HaguebDr W. Junk Publishersc1974  aEcological systems