Chrystal, G. 1851-1911. Algebra,: an elementary text-book for the higher classes of secondary schools and for colleges/ G. Chrystal. - 6th ed. - New York: Chelsea, 1952. - 2 v.: illus.; 21 cm. LCCN: a 54000422 Subjects--Topical Terms: Algebra.Algebra.Algebra E Analise. Dewey Class. No.: 512