00307nam a2200121Ia 4500082001700000100001700017245004100034260003600075300002200111490004200133500000500175700000500180  a514bC678.CS  aCohen, M. M.  aA course in simple homotopy theoryb  aNew YorkbSpringer-Verlagc1973  axii, 114p. Index.  aGraduate texts in Mathematicsv v. 10  a  a