Cook, Thomas D. <br/><br/>
Quasi-experimentation  design analysis issues for field settings 
Thomas D. Cook, Donald T. Campbell 
 - Boston  Houghton Mifflin  1979 
 - xii, 405p. : ill. ; 23cm 
<br/><br/>Bibliography: p.387-396 
<br/><br/><label>ISBN: </label>0395307902 
<br/><br/><label>LCCN: </label>81-81077 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research<br/>Social sciences--Field work