00809nam a2200193Ia 4500003000900000008004100009020001800050040001600068080002000084111009400104245018800198260003700386300001400423490006300437650004100500650002500541650002100566700002800587IN-BaIIA211028s9999    xx            000 0 eng d  a0-7923-1914-1  cIIA Library  a063:52bIAU-21B  aInternational Astronomical Union General Assemblyn21stcArgentinad1991 July 23 - Aug. 1 0aXXIst General assembly bproceedings of the 21st General Assembly, Buenos Aires, Argentina, July 23 - August 1, 1991cedited by Jacqueline Bergeron                                     aDordrechtbKluwer Academicc1992  axv, 366p.  aTransactions of the International Astronomical Union; v. X  aAstronomy and Astrophysics Thesaurus  aIAU General Assembly  aIAU Transactions  aBergeron, Jacqueline ed