XXIst General assembly   proceedings of the 21st General Assembly, Buenos Aires, Argentina, July 23 - August 1, 1991 
edited by Jacqueline Bergeron                                    
 - Dordrecht  Kluwer Academic  1992 
 - xv, 366p. 
 - Transactions of the International Astronomical Union; v. X .
<br/><br/><label>ISBN: </label>0-7923-1914-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>IAU General Assembly<br/>IAU Transactions
<br/><br/><label>Universal Decimal Class. No.: </label>063:52  / IAU-21B