Polit, Denise F. <br/><br/>
Nursing research :  principles and methods / 
Denise F. Polit, Bernadette P. Hungler. 
 - Philadelphia :  Lippincott,  1978. 
 - xx, 663 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0397542208 
<br/><br/><label>LCCN: </label>7818493  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nursing--Research.