Explanatory Supplement to the Astronomical Ephemeris and the American Ephameris and Nautical Almanac 

 - London:  Her Majesty's Stationery Office  1961 
 - 505p. :   il; 25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrofísica y Astronomía Descriptiva