00368nam a2200109Ia 4500008004100000082001700041100002000058245004800078260003900126630002800165650006500193211122s9999||||xx |||||||||||||| ||und|| a512.4bHAZ-G aHazrat, Roozbeh 0aGraded Rings And Graded Grothendieck Groups bCambridge University PressaLondon xPost Graduate Reference aMathematicsvNATURAL SCIENCE & MATHEMATICSMATHEMATICSALGEBRA