The astronomical Almanac for the year 1990 
U S Government Printing Office                               
 - Washington  U. S. Government Printing Office  1989 
 - [various pagings.] 
<br/><br/><label>ISBN: </label>011 886934 5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Almanacs<br/>Ephemerides<br/>NASA
<br/><br/><label>Universal Decimal Class. No.: </label>059:52  / AAL-90