Wheldon, Harold J. Wheldon's Business statistics and statistical method. - 8th ed. / [by] G. L. Thirkettle. - Plymouth : Macdonald and Evans, 1976. - xi, 244 p. : ill., forms, maps ; 22 cm. Cover title: Wheldon's business statistics. Includes index. ISBN: 0712123318 : £2.00 LCCN: 77364500 Nat. Bib. No.: GB77-06050 Subjects--Topical Terms: Statistics. LC Class. No.: HA29 / .W513 1976 Dewey Class. No.: 519.502465 / G W