00293nam a2200109 a 450000500170000000800410001704100080005810000190006624500460008526400410013130000110017220260717072124.0260701s1976    ii            000 0 eng d  aeng1 aMackean, D. G.10aIntroduction to biology /cMackean, D. G. 1bAllied PublishersPublication,c1976.  a223 p.