Reference systems  proceedings of the 127th Colloquium of the International Astronomical Union on Reference systems held in Virginia Beach, VA, USA 14-20 October 1990 
edited by J. A. Hughes, C. A. Smith and  G. H. Kaplan                                              
 - Washington  U. S. Naval Observatory  1991 
 - xiii, 419p. 
 - IAU Colloquium; no.127 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrometry<br/>Astronomy and Astrophysics Thesaurus<br/>Celestial mechanics<br/>Reference Systems
<br/><br/><label>Universal Decimal Class. No.: </label>082.2:52  / IAU-C127