00336nam a2200109Ia 4500008004100000082001700041100002000058245004700078260005000125300001600175440003500191260903b        |||||||| |||| 00| 0 eng d  a512bM117.AT  aMacaulay, F. S.  aThe algebraic theory of modular systemsb/  aCambridge:bCambridge University Press,c1994  axxxi, 112p.  aCambridge Mathematical Library