Guba, Egon G. <br/><br/>
Fourth generation evaluation / 
Egon G. Guba, Yvonna S. Lincoln. 
 - Newbury Park, Calif. ;  London :  Sage,  c1989. 
 - 294 p. :  ill. ;  23 cm. 
<br/><br/>Bibliography: p. 271-279. - Includes index. 
<br/><br/><label>ISBN: </label>0803932359 : 9780803932357 
<br/><br/><label>Nat. Bib. No.: </label>GB9137298  bnb 
<br/><br/><label>Subjects--Index Terms: </label>Research  Assessment