00273nam a2200109 a 450000500170000008200190001710000160003624500240005226000400007630000160011649000310013220251203090507.0  a581.5,bD, mil  aMiles, John  aVegetation dynamics  aLoNew DelhionbChapman & Hallc1979  a80p, 22 cm.  aOutline studies in Ecology