"Geomagnetism Observations Periodicals." . . "Astronomy." . . "Geomagnetism." . . "Meteorology." . . "Meteorology Observations Periodicals." . . "Observations"@en . . . "House documents / Astronomical, magnetic and meteorological observations made during the year ... at the United States Naval Observatory" . "Astronomical, magnetic and meteorological observations made during the year ... at the United States Naval Observatory"@en . . "Periodicals"@en . "Astronomical, magnetic and meteorological observations made ... at the United States Naval Observatory"@en . . . "Astronomical, magnetic and meteorological observations made during the year ... at the United States Naval Observatory" . "Washington observations" . "Washington observations"@en . . . . . . . . . . . . . . . . . . . . "Astronomical, magnetic and meteorological observations made at the United States Naval Observatory"@en . . . . . "Astronomy Observations Periodicals." . . "Naval Observatory (Washington, D.C.)" . . "United States Naval Observatory." . .