Probability and its engineering uses, by Thornton C. Fry ... Fry, Thornton C. (Thornton Carle), 1892- Probabilities. QA273 .F93 20 519 FRP "References for outside reading" at end of each chapter. Treated with special reference to applications in the telephone business. New York, D. Van Nostrand Company, inc., c1928. c1928. 1928 Text xiv, 476 p. eng