Ekeblad, Frederick A. The statistical method in business : applications of probability and inference to business and other problems / by Frederick A. Ekeblad. - New York : Wiley, c1962. - xii, 791 p. : ill., 21 cm. Includes index. Subjects--Topical Terms: Probabilities. Dewey Class. No.: 519.2 / EKS 1962