Merrill, Ray M. Introduction to epidemiology. - 5th ed. - Sudbury, Ma : Jones and Bartlett Publishers, 2010. - xi, 417 p. ill. 26.5 cm. Includes index. ISBN: 9780763766221 Subjects--Topical Terms: Epidemiologic methodsEpidemiology National Library of Medicine Call No.: WA 950 MI 2010