Ulrich's international periodicals directory 
/ R R Bowker Company 
 - 15th ed.  
 - New York:   R R Bowker Company,   1973 
 - 118p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information science
<br/><br/><label>Subjects--Index Terms: </label>Periodicals  
<br/><br/><label>Universal Decimal Class. No.: </label>R 05(058.7)  / J9;M5.2