00275nam a2200109Ia 4500082001700000100004400017245001400061260003000075300002100105500000500126700003400131  a512bM161.Al  aMacLane, Saunders and Birkhoff, Garrett  aAlgebrab  aNew YorkbMacmillanc1968  axix, 598p. Index  a  aBirkhoff, Garrett ; jt. auth.