Silman, Alan J. Epidemiological studies : a practical guide / Alan J. Silman and Gary J. Macfarlane - 2nd ed. - Cambridge : Cambridge University Press, 2002 - 241 p. : ill. ; 25 cm. Includes index ISBN: 0521810973 RM410.61 Subjects--Topical Terms: Epidemiologic Methods National Library of Medicine Call No.: WA950