00711nam a22002051 4500 1/19574 020904s1993 enk 11 eng d 0198522215 20142 DLC GR-PeUP 614.4'072 CL Clayton, David. Statistical methods in epidemiology / Clayton D., Hills M. Oxford : Oxford University Press, 1993 viii, 367 p. : ill. ; 24 cm. Includes bibliographical references and index Epidemiology Statistical methods. Hills, Michael. INST UNIPILB MAIN 20040709 614.4'072 CL 00140295 00140295 LOAN 0 1 /webopac/covers/01/20142_0198522215.jpg