00390nam a2200121Ia 4500008004100000020001800041082001700059100002300076245004600099260005000145300002100195490005200216260313b        |||||||| |||| 00| 0 eng d  a9780521169981  a514bW415.IH  aWeibel, Charles A.  aAn introduction to homological algebrab/  aNew Delhi:bCambridge University Press,c2010  axiv, 450p. Index  aCambridge studies in advanced Mathematics v 38