TY  - BOOK
ED  - United States. Government Printing Office
TI  - The Astronomical Almanac for the year 1981
PY  - 1980///
CY  - Washington
PB  - U. S. Government Printing Office
KW  - Almanacs
KW  - Astronomy and Astrophysics Thesaurus
KW  - Ephemerides
ER  -