Freund, John E. Elementary business statistics : the modern approach / by John E. Freund and Frank J. Williams. - Englewood Cliffs, N.J. : Prentice-Hall, 1964. - 478 p. : illus., tables. ; 24 cm. Bibliography: p. [429]-434. LCCN: 64010228 Subjects--Topical Terms: Statistics. LC Class. No.: HA29 / .F683 Dewey Class. No.: 650.0212 / FRE 1964