Zassenhaus, Hans. The theory of groups / Hans Zassenhaus - 2d ed. - New York : Chelsea Pub. Co. , [1958] - 265 p. : ill. ; 24 cm. Translation of Lehrbuch der Gruppentheorie. Bibliography: p. 255-258. Subjects--Topical Terms: Group theory. Dewey Class. No.: 512.2 / ZAT 1949