Ulrich's international periodicals directory  
/ R R Bowker Company 
 - 18th ed. (1979-1980) 
 - New York:   R R Bowker Company,   1979 
 - 1058p.  
 - A bowker serials bibliography .
<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)  / L9;2