00412nam a2200133Ia 4500082001800000100002000018245005600038260004900094300001600143490004000159500004700199500000500246700002700251  a514bSt814.CO  aSteenrod, N. E.  aCohomology operationsbcLectures by N. E. Steenrod  aNew JerseybPrinceton University Pressc1962  a138p. Index  aAnnals of Mathematics studies v 50  a"Written and revised by D. B. A. Epstein".  a  aEpstein, D.B.A. ; rev.