00301nam a2200109Ia 4500008004100000040003800041100001200079245002000091260004600111300001800157653001600175211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aHu, S T 0aHomotopy theory  bACADEMIC PRESSaNEW YORK AND LONDONc1959  aXIII,347 P p.  aMATHEMATICS