00352nam a2200109Ia 4500008004100000082001800041100002300059245007200082260003600154300001300190490003900203260325b        |||||||| |||| 00| 0 eng d  a514bAn634.CH  aAntonelli, Peter L  aThe concordance-homotopy groups of geometric automorphism groupsb/  aBerlin:bSpringer-Verlag,c1971  ax, 140p.  aLecture notes in Mathematicsv 215