00351nam a2200121Ia 4500082001700000100002300017245008600040260003400126300002100160490003800181500000500219700000500224  a514bM416.HC  aMassey, William S.  aHomology and cohomology theory; an approach based in Alexander-Spanier cochainsb  aNew YorkbMarcel Dekkerc1978  axiv, 412p. Index  aPure and Applied Mathematicsv 46  a  a