Ulrich's international periodicals directory 
/ R R Bowker Company 
 - New York:   R R Bowker Company,   1969 
 - 223p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information science
<br/><br/><label>Universal Decimal Class. No.: </label>R 05(058.7)  / K7.3