00317nam a2200121Ia 4500082001700000100002400017245004400041260003400085300002800119490003800147500000500185700000500190  a514bB112.CM  aBabakhanian, Ararat  aCohomological methods in group theoryb  aNew YorkbMarcel Dekkerc1972  avii, 241p. Index, Bibl.  aPure and Applied Mathematicsv 11  a  a