Campbell, Donald T. <br/><br/>
Experimental & quasi-experiment : designs for research /  
Donald T. Campbell. 
 - 93 ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Education.<br/>Science.<br/>Statistics.<br/>Social research.<br/>Studies.
<br/><br/><label>Dewey Class. No.: </label>300.72  / C187