Fehr, Howard F. An introduction to sets, probability and hypothesis testing Howard F. Fehr, Lucas N.H. Bunt, George Grossman. - Lexington, Mass., D. C. Heath c1964. - ix, 230 p. ill. 24 cm. Includes index. LCCN: Subjects--Topical Terms: ProbabilitiesSet theory. LC Class. No.: QA273 / .F34