00323nam a2200121Ia 4500082001700000100002300017245003600040260003400076300002600110490005500136500000500191700000500196  a514bP847.IF  aPorter, Richard D.  aIntroduction to fibre bundlesb  aNew YorkbMarcel Dekkerc1977  av, 170p. Index, Bibl.  aLecture notes in Pure and Applied Mathematicsv 31  a  a