Campbell,  D.  T. <br/><br/>
Experimental and  quasi   Experimental designs for  research/ 

 - Ilallas  Houghton Mifflin Company  1963 
 - IX, 84P  Pbk 
<br/><br/><label>ISBN: </label>0395307872 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Experimentakl  designs.
<br/><br/><label>LC Class. No.: </label>Q175.C2 1963