Explanatory Supplement to The Astronomical Ephemeris and The American Ephemeris and Nautical Almanac prepared jpintly by the Nautical Almanac Offices of the United Kingdom and The United States of America 

 - London:  Her Majesty's Stationery Office  1961 
 - 505p. :   il; 23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrometrķa<br/>astrometrķa