Reading on the vertical file / 
Michael D. G. Spencer ... (et al.) 
 - Englewood, Colo. :  Libraries Unlimited,  1993. 
 - 174 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>0872879933  RM27.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vertical files (Libraries).