Epidemiologic methods / 
by Brain MacMahon,Thomas F Pugh and Johannes Ipsen 
 - Toronto:  Little Brown and Company,  1960. 
 - vii;302p. :  04428-G. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population
<br/><br/><label>Dewey Class. No.: </label>D2 M