Observatories in earth orbit and beyond  proceedings of the 123rd colloquium of the International Astronomical Union held in Greenbelt, Maryland, USA, April 24-27,1990 
edited by Y. Kondo                                           
 - Dordrecht  Kluwer Academic  1990 
 - xii, 572p. 
 - Astrophysics and Space Science Library; v. 166 .
<br/><br/><label>ISBN: </label>0-7923-1133-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>Earth orbit<br/>Observatories
<br/><br/><label>Universal Decimal Class. No.: </label>52(082.1)  / ASS-166