Leedy, Paul <br/><br/>
Practical Research : planning and design 

 - 313 páginas ; 28 cm. 
<br/><br/>
<br/><br/><label>ISBN: </label>0023692200 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INVESTIGACION
<br/><br/><label>Dewey Class. No.: </label>001.43  / L517p