APA (7th ed.) Citation

(1948). Description of the earth's main magnetic field and its secular change: 1905-1945.

Chicago Style (17th ed.) Citation

Description of the Earth's Main Magnetic Field and Its Secular Change: 1905-1945. Washington, DC, 1948.

MLA (9th ed.) Citation

Description of the Earth's Main Magnetic Field and Its Secular Change: 1905-1945. 1948.

Warning: These citations may not always be 100% accurate.