Schenkman, Eugene. Group theory [by] Eugene Schenkman. - Princeton, N.J., Van Nostrand [1965] - University series in higher mathematics . Bibliography: p. 283-285. LCCN: 65008318 //r90 Subjects--Topical Terms: Group theory. LC Class. No.: QA171 / .S36 Dewey Class. No.: 512.86