00298nam a2200121Ia 4500008004000000082001500040100001500055245003700070250000500107260003600112300000800148650002000156210210b1977   xxu||||| |||| 00| 0 eng d  a581.5 VERT  aVERMA (V).  aTextbook of plant ecology. Ed 3.  a  aDelhibEmkay Publicationsc1977  a344  aPlant Ecology