00396nam a2200121Ia 4500008004100000020001500041082001800056100002200074245008900096260003800185300002700223490002400250260310b        |||||||| |||| 00| 0 eng d  a3110162717  a514bSa266.LT  aSaveliev, Nikolai  aLectures on the topology of 3-manifoldsb: an introduction to the Casson invariant /  aBerlin:bWalter de Gruyter,c1999  aix, 199p. Bibl. Index.  aDe Gruyter textbook