TY  - BOOK
AU  - U.s.Naval Observatory
TI  - The american ephemeris and nautical almanac
PY  - 1971///
CY  - Washington
PB  - U.s. Government Printing Office
KW  - Astronomia
KW  - Calendario
KW  - Ciclos
KW  - Estrellas
KW  - Satelites
KW  - Mercurio
KW  - Venus
KW  - Martes
KW  - Jupiter
KW  - Efemerides
KW  - América
ER  -