00259nam a2200097 a 450000500170000008200220001710000150003924500500005426000350010430000220013920251203090507.0  a581.5222,bD, lev  aLevitt, J.  aResponses of plants to environmental stresses  aNew YorkbAcademic Pressc1972  axiv, 697p, 23 cm.