00510nam a22001697a 4500008004100000020001500041020001800056050002300074100002000097245006600117250001200183260004200195300003400237500003300271650001300304700002300317161011b        xxu||||| |||| 00| 0 eng d  a0801625246  a9780801625244  aQH 308.2 .R38 1991  aRaven, Peter H.  aUnderstanding biology/cPeter H. Raven and George B. Johnson.  a2nd ed.  aSt. Louis :bMosby Year Book ;c1991.  axxvi, 1025p. :bill. ;c27cm.  aIncludes appendix and index.  aBiology.  aJohnson, George B.