Elwood, J. Mark. <br/><br/>
Causal relationships in medicine:  a practical system for critical appraisal/ 
J. Mark Elwood. 
 - Oxford  New York:  Oxford University Press,  1988. 
 - xi, 332 p.:  ill.;  24 cm. 
 - Oxford medical publications .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 257-263. 
<br/><br/><label>ISBN: </label>0192617036  $65.00 
<br/><br/><label>LCCN: </label>88009921 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Diseases--Causes and theories of causation.<br/>Epidemiologic Methods.<br/>Epidemiology--Research--Methodology.<br/>Epidemiology.
<br/><br/><label>Dewey Class. No.: </label>614.4/028