Risultati ricerca
Washington, D.C. : United States Naval Observatory, 2001
Washington, D.C. : United States Naval Observatory, 2001
USNO [United States Naval Observatory] SA2.0 [risorsa elettronica]
/ United States Naval Observatory
Washington : U.S. Naval Observatory [USNO], 1998 (September)
USNO [United States Naval Observatory] SA2.0 [risorsa elettronica]
/ United States Naval Observatory
Washington : U.S. Naval Observatory [USNO], 1998 (September)
Washington : U.S. Naval Observatory, 2001
Washington : U.S. Naval Observatory, 2006
Washington : U.S. Naval Observatory, 1998
Washington : Government printing office, 1921