00552nam a2200145Ia 4500082001700000100004300017110003200060245013300092260004800225300002700273490006000300500000500360710003400365856000700399  a514bH714.TD  aHog-Angeloni, Cynthia and Othersdeds.  aMetzler, Wolfgang ; jt. ed.  aTwo dimensional homotopy and combinatorial group theorybcEd. by Cynthia Hog-Angeloni, Wolfgang Metzler and Allan J. Sieradski.  aCambridgebCambridge University Pressc1993  axi, 412p. Index, Bibl.  aLondon Mathematical Society lecture note series ; v.197  a  aSieradski, Allan J. ; jt. ed.  df