Wallis, W. Allen Statistics, a new approach by W. Allen Wallis and Harry V. Roberts. - Glencoe, Ill. Free Press [1956] - 646 p. illus. 25 cm. LCCN: 56008453 /L/r86 Subjects--Topical Terms: Statistics LC Class. No.: HA29 / .W3354 Dewey Class. No.: 311.2