00257nam a2200109 a 450000500170000008200190001710000160003624500270005225000120007926000390009130000170013020251203090509.0  a581.1,bD, bar  aBaron, WMM.  aOrganization in plants  a3rd ed.  aLoNew DelhionbEdward Arnoldc1963  a264p, 22 cm.