00652nam a2200157Ia 4500003000900000008004100009040001600050080001800066110004200084245024800126260004600374300002300420650001200443650002500455650001400480IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a(059):52bNAU  aHer Majesty's Nautical Almanac Office 4aThe astronomical almanac for the year 2020band its companion the astronomical almanac online data for astronomy, space sciences, geodesy, surveying, navigation, and other applicationscNautical Almanac  Office, United States Naval Observatory  aWashingtonbNautical Almanac Officec2019  a[various pagings.]  aAlmanac  aAstronomical almanac  aEphemeris