Gupta s. K. , <br/><br/>
Basic Principles of Clinical Research and Methodology  Textual Documents 

 -  Jaypee Brothers Med. Pub.  2009 
 - 504. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Dewey Class. No.: </label>615.6  / GUP