Leedy, Paul D. <br/><br/>
Practical research  : planning and design 

 - New York:  Macmillan,  1974. 
 - 246p. 
<br/><br/> Includes index 
<br/><br/><br/>eng 
<br/><br/><label>ISBN: </label>0023692405 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational research-Technique
<br/><br/><label>Dewey Class. No.: </label>001.43  / LEP