Friedman , G. D.  . <br/><br/>
Primer Of Epidemiology /   Textual Documents 

 - 3rd /   . 
 -  McGraw ,   1987. 
 - 305:  20 ; ;   . . 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Index Terms: </label>Epidemiology  Preventive and Social Medicine  Medical Science 
<br/><br/><label>Dewey Class. No.: </label>614.4  / FRI