Ulrich's update 
/ R R Bowker Company 
 - New Jersey:   R R Bowker Company,  
 - 318p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information science
<br/><br/><label>Universal Decimal Class. No.: </label>R 05(058.7) Supp   / N2.5.1