Abramson, J. H. <br/><br/>
Research methods in community medicine :  Surveys,epidemiological research,programme evaluation,clinical trials / 

 -  Wiley Online Library ,  2008. 
<br/><br/><label>ISBN: </label>9780470987230 
<br/><br/><label>Subjects--Index Terms: </label>Medical Statistics, Epidemology