Jekel, James F. <br/><br/>
Jekel's Epidemiology, Biostatistics, Preventive Medicine, and Public Health 

 -  W B Saunders Company. 
 - 1 online resource 
<br/><br/><label>ISBN: </label>9781455706563 1455706566 9781455706587 1455706582 
<br/><br/><label>Dewey Class. No.: </label>614.4