00448nam a2200133Ia 450000500170000000800410001704100080005808200140006610000220008024500330010226000370013530000160017265001260018820191107113022.0190709s9999    xx            000 0 und d  aeng  a574 C941B  aCurtis, Francis D 0aBiology b: the living world  aBostonb:Ginn and Company,c1958  axiii, 704p.  aBiology - Living thing - Kinds a| Food - Lifea| Nature - Behavior a| Methods - Reproductiona| Conservation - Wildlife