00779nam0-22003011i-450-990002558590403321000255859FED01000255859(Aleph)000255859FED0100025585920000920d1966----km-y0itay50------baENGAlgebraic StructuresA.W. Bell.LondonGeorge Allen1966.142 p.19 cmMathematical studies2InsiemiStrutture algebriche516Bell,Alan William104171ITUNINARICAUNIMARCBK990002558590403321MXXV-A-84945MASMASAlgebraic Structures437008UNINAING01