The magnetic declination at Oslo Observatory 1843-1930
Subtitle: (daily values for 9 and 14 o'clock)
Contributors: Universitetet i Oslo. Astronomiske og magnetiske observatorium.
Series: Geofysiske publikasjoner,; v. 16, no. 4
Publisher: Grøndahl & søns boktrykkeri
Published: 1945
Place of publication: Oslo
Language: eng
Number of pages: 56
Subjects: Geomagnetism -- Observations.
Notes: "References": p. 11.
Cover-title.