00297nam a2200109Ia 4500008004100000082002300041100001900064245003100083260003800114300000800152650002700160120425s9999    xx            000 0 und d  a BOT  581.7  VAS-T  a Vasishta, P C  a Textbook of plant ecology  b Vishal Publications, Delhic1989  a340  a Plant ecology; Botany