Gangolli, R. A. Discrete probability / by R.A. Gangolli [and] Donald Ylvisaker. - New York : Harcourt, Brace & World, 1967. - xii, 223 p. ; 23 cm. Index : p. 211. Subjects--Topical Terms: Probabilities. Dewey Class. No.: 519 / GAD 1967