00550nam a2200181 a 450000500170000008200190001710000260003624500390006226000400010130000210014149000400016269000230020270000210022596400250024699700180027199900150028995200640030420251203090505.0  a514.2,bD, gre  aGreenberg, Marvin, J.  aAlgebraic topology: a first course  aMenlo ParkbBenjamin/Cummingsc1981  axi, 311p, 22 cm.  aMathematics lecture note seriesd58  aAlgebraic topology  aHarper, John, R.  bEngc100de010fg_  a17823 LIBSC C  c9421d9421  00104070aPUbPUd1998-04-08l0o514.2, D, grep17823yBK