00328nam a22001097a 450000500170000000800410001704000130005808200200007124500830009126000330017430000110020720250225093032.0250225b        |||||||| |||| 00| 0 eng d  cPK-LaUMT  a616.89152bWHA-  aWhat is a group? :ba new look at theory in practice /cedited by Chris Oakley  aLondon :bRebus Press,c1999  a243 p.