Katz, David . L <br/><br/>
Jekel's Epideomology, Biostatistics, Preventive Medicine, and Public health 

 - 4th 
 -  Saunders Elsevier 
 - 405 
<br/><br/><label>ISBN: </label>978-1-4557-0658-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology