00735nam0-22002891i-450-990002557580403321000255758FED01000255758(Aleph)000255758FED0100025575820000920d1959----km-y0itay50------baENGHomotopy TheorySze-Then Hu.New YorkAcademic Press1959.xiii, 347 p.24 cmInsiemiStrutture algebriche516Hu,Sze-Tsen102630ITUNINARICAUNIMARCBK990002557580403321MXXV-A-15742MASMASHOMOTOPY theory355035UNINAING01