Barker, D. J. P. Practical epidemiology [[Book] /] D.J.P. Barker, A.J. Hall. - 4th ed. - Edinburgh ; New York : Churchill Livingstone, 1990. - 173 p; ; 21 cm. - Medicine in the tropics series . - Medicine in the tropics. . Includes index. Includes bibliographical references. ISBN: 0443037876 LCCN: 90002015 Subjects--Topical Terms: Epidemiology--Technique.Epidemiology. LC Class. No.: RA652.4 / .B37 1990 Dewey Class. No.: 614.40723 614.40723 614.40723 National Library of Medicine Call No.: WA 105 B255p / B P