00381nam a22000857a 4500008004100000100001800041245017000059264003100229653003500260240123s1980    cs ||||| |||| 00| 0 eng d  aPultr, Aleš  aCombinatorial, algebraic, and topological representations of groups, semigroups, and categories /cAleš Pultr, Věra Trnková ; Czechoslovak Academy of Sciences.  aPrague :bAcademia,c1980.  aმათემატიკა