Earl, Boyd. Introduction to probability : a programmed unit in modern mathematics / Boyd Earl, and program editors J. William Moore and Wendell I. Smith. - New York : McGraw-Hill, [1963] Bibliography: p. x. LCCN: 63014577 Subjects--Topical Terms: Probabilities -- Programmed instruction.--Probabilities -- Programmed instruction. LC Class. No.: QA273 / .E15 Dewey Class. No.: 519.1