Yach, D <br/><br/>
Epidemiological research methods. Part I. Why epidemiology?  [electronic resource] 

 -  South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde  Aug 1986 
 - 267-70 p.  digital 
<br/><br/> Publication Type: Historical Article; Journal Article 
<br/><br/><label>ISSN: </label>0256-9574 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiologic Methods<br/>Epidemiology--history<br/>History, 19th Century<br/>History, 20th Century<br/>South Africa