00360nam a2200133Ia 4500008004100000082001600041100002100057245003600078260004500114300000800159650002300167650001800190653001800208170901s1951    xx            000 0 und d  a581.5bC53B  aConard, Henry S. 4aThe Background of Plant Ecology  aLowabThe Lowa State College Pressc1951  a238  aBotanical sciences  aPure Sciences  aPlant Ecology