00306nam a2200121 a 450000500170000008200200001710000250003724500480006225000120011026000310012230000100015370000210016320251203090719.0  a581.16,bD, har  aHartmann, Hudson, T.  aPlant propagation: principles and practices  a4th ed.  aDelhibPrentice-Hallc1986  a727p.  aKester, Dale, E.