The astronomical almanac for the year 2012 and its companion data for astronomy, space sciences, geodesy, surveying, nav 
Nautical Almanac Office, United States Naval Observatory     
 - Washington  U. S. Naval Observatory  2011 
 - [various pagings.] 
<br/><br/><label>ISBN: </label>978-0-7077-41215 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomical almanac<br/>Ephemeries
<br/><br/><label>Universal Decimal Class. No.: </label>(059):52  / NAU