00289nam a2200109Ia 4500008004100000020001800041082001500059100002200074245003900096260003600135300000800171190710s9999    xx            000 0 und d  a81-8128-694-9  a514.2 M385  aMassey, William S 0aBasic course in algebraic topology  aNew YorkbSpringer Verlagc2007  a428