Friis, Robert H. <br/><br/>Epidemiology for Public Health Practice/ Robert H. Friis.--  -- 4th ed.--  -- Boston:  Jones and Barlett Publishers,  2009. <br/>xxii., 717p.:  ill., col.,  23 cm. <br/><br/> includes bibliographical references and index <br/><br/><label>ISSN: </label>978-0-7637-5161-6 <br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology<br/>Public Health Personnel<br/><br/><label>Dewey Class. No.: </label>Res 614.4 F916 2009