Astronomical phenoma for the year 1993 / 
prepared jointly by The Nautical Almanac Office United Stats Naval Observatory and Her Majesty's Nautical Almanac Office Royal Greenwich Observatory. 
 - Wash. :  Government Printing Office,  c1991. 
 - 76 pages ;  25 cm 
<br/><br/><label>ISBN: </label>0160359228 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy--Periodicals.<br/>NAUTICAL ASTRONOMY.<br/>NAUTICAL CHARTS.<br/>Astronomy
<br/><br/><label>LC Class. No.: </label>Q39  / As8 1991