TY  - BOOK
ED  - Her Majesty's Nautical Almanac Office
TI  - The astronomical almanac for the year 2020: and its companion the astronomical almanac online data for astronomy, space sciences, geodesy, surveying, navigation, and other applications
PY  - 2019///
CY  - Washington
PB  - Nautical Almanac Office
KW  - Almanac
KW  - Astronomical almanac
KW  - Ephemeris
ER  -