00246nam a22000977a 4500003000400000008004100004082001700045100001800062245003000080260003800110OSt230624b        |||||||| |||| 00| 0 eng d  a581.5bB1411  aAmbasht, R.S.  aTextbook of Plant Ecology  aS.R., TechnierbSt. Friendsc1976