Astronomical phenomena for the year ... 
issued by the Nautical Almanac Office, United States Naval Observatory. 
 - Washington  The Office  For sale by the Supt. of Docs., U.S. G.P.O.  1950- 
 - v.  maps  26 cm. 
 - 1951- 
<br/><br/>Vols. for 1951- issued by the Nautical Almanac Office, United States Naval Observatory (<1981-> prepared jointly with Her Majesty's Nautical Almanac Office, Royal Greenwich Observatory). 
<br/><br/>Vols. for 1951-19 reprinted from: American ephemeris and nautical almanac. 
<br/><br/><label>ISSN: </label>0083-2421 
 = Astronomical phenomena 
 = Astron. phenom. 
<br/><br/><label>LCCN: </label>51060475 //r842 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy--Periodicals.
<br/><br/><label>LC Class. No.: </label>QB9  / .U55 
<br/><br/><label>Dewey Class. No.: </label>525/.5 
<br/><br/><label>GPO Item No.: </label>0396-A 
<br/><br/><label>Gov. Doc. Class. No.: </label>D 213.8/3: