Discrete probability [by] R.A. Gangolli [and] Donald Ylvisaker. Gangolli, R. A. Ylvisaker, Donald, author. Probabilities. QA273 .G32 519.1 GAD Bibliography: p. 211. New York, Harcourt, Brace & World [1967] [1967] 1967 Text xii, 223 p. eng Harbrace college mathematics series Harbrace college mathematics series.