Magnetic declination in the United States for January 1, 1920
By: by Daniel L. Hazard.
Series: Special publication -- no. 90; Serial -- no. 215; Special publication (U.S. Coast and Geodetic Survey) -- no. 90.; Serial (U.S. Coast and Geodetic Survey) -- no. 215.
Publisher: U.S. Govt. Print. Off.
Published: 1922
Place of publication: Washington, D.C
Language: eng
Number of pages: 30
Subjects: Geomagnetism -- United States
Other titles: Terrestrial magnetism