Books in print:   Supplement 1975-1976 

 - New York:   R R Bowker Company,   1976 
 - 2235p. 
<br/><br/><label>ISBN: </label>0835208494 
<br/><br/><label>ISSN: </label>0000-0310 
<br/><br/><label>Universal Decimal Class. No.: </label>R 017(73)