"Friis, Robert H." <br/><br/>
Epidemiology for Public Health Practice. 

 - 1999 
 -  Nursing  9780834211780 
<br/><br/><label>ISBN: </label>An Aspen Publication 
<br/><br/><label>Subjects--Topical Terms: </label><br/>2nd ed.
<br/><br/><label>Subjects--Index Terms: </label>1