American reference books annual 1989.  v.20 / 
 ARBA  1989. 
Bohdan S. Wynar editor. 
 - Littleton, Colo. :  Libraries Unlimited,  1989. 
 - xxii, 712 p. 
<br/><br/><label>ISBN: </label>0872877582 
<br/><br/><label>ISSN: </label>0065-9959 
<br/><br/><label>LCCN: </label>90064133     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reference books--Bibliography--Periodicals.