Barker, D. J. P. Practical epidemiology / D.J.P. Barker, with chapters by F.J. Bennett. - 3rd ed. - Edinburgh ; New York : Churchill Livingstone, 1982. - viii, 159 p. : ill. ; 22 cm. - Medicine in the tropics . Includes index. Bibliography: p. [155] ISBN: 0443023034 (pbk.) Subjects--Topical Terms: Epidemiology--Technique. LC Class. No.: RA652 / .B37 1982