00375nam a2200145 a 4500020001500000082001300015100002000028245002600048250001200074260004800086300003800134650001200172700002500184700002000209 a087901132700a574bRAV1 aRaven, Peter H.10aUnderstanding Biology a3rd ed. aNew York, N.Y. :bWorth Publishers,cc1981. axvi, 686 p. :bill. (some col.) ; 0aBotany.1 aEvert, Ray Franklin.1 aCurtis, Helena.