00432nam a2200121Ia 4500082001700000100001800017245014300035260005400178300001500232490005300247500000500300700000500305  a512bH656.LH  aHilton, Peter  aLectures in homological algebra; expository lectures from the CBMS regional conference held at Virginia Polytechnic Institute, July 1970b  aRhode IslandbAmerican Mathematical Societyc1971  aviii, 74p.  aRegional conference series in Mathematicsv no.8  a  a