00362nam a2200121Ia 4500082001700000100003600017245006800053260003400121300001300155490003900168500000500207700002800212  a514bB662.HI  aBoardman, J. M. and Vogt, R. M.  aHomotopy invariant algebraic structures on topological spacesb  aBerlinbSpringer-Verlagc1973  ax, 257p.  aLecture notes in Mathematicsv 347  a  aVogt, R. M. ; jt. auth.