00338nam a2200133 a 450000500170000000800410001704100080005808200100006610000210007624500400009726400370013730000100017465000200018420260717090930.0260717s1971    ii            000 0 eng d  aeng04a581.51 aScott, George D.10aPlant symbiosis /cScott, George D. 1bEdward Arnold Publishers,c1971.  a57 p. 4aPlant symbiosis