Epidemiology, biostatistics and preventive medicine 
James F.Jekel...[etal]. 
 - 3rded.. 
 - Philadelphia  Saunders  c2007. 
 - xii,421p.: ill.; 26cm. 
<br/><br/><label>ISBN: </label>9781416034964 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medicine,Preventive ;Biometry ;Medical statistics.
<br/><br/><label>Dewey Class. No.: </label>614.4  / E76E