TY - BOOK AU - Griess,Robert L. TI - Twelve sporadic groups T2 - Springer monographs in mathematics SN - 3540627782 AV - QA177 G75 U1 - 512/.2 21 PY - 1998/// CY - Berlin PB - Springer Verlag KW - Grupos finitos simples N1 - Includes bibliographical references (p. [154]-160) and index ER -