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17 bita dihapus ,  3 tahun yang lalu
cosmetic changes, replaced: Survey → Survei, removed stub tag
* ''[http://www.agu.org/sections/geomag/background.html Geomagnetism & Paleomagnetism background material]''. American Geophysical Union Geomagnetism and Paleomagnetism Section.
* ''[http://geomag.usgs.gov National Geomagnetism Program]''. [[United States Geological Survey]], March 8, 2011.
* ''[http://www.geomag.bgs.ac.uk BGS Geomagnetism]''. Information on monitoring and modeling the geomagnetic field. British Geological SurveySurvei, August 2005.
* William J. Broad, ''[http://www.nytimes.com/2004/07/13/science/13magn.html?ex=1247457600&en=e8f37e14d213ba16&ei=5090&partner=rssuserland Will Compasses Point South?]''. [[New York Times]], July 13, 2004.
* John Roach, ''[http://news.nationalgeographic.com/news/2004/09/0927_040927_field_flip.html Why Does Earth's Magnetic Field Flip?]''. National Geographic, September 27, 2004.
* [http://www.vukcevic.talktalk.net/Global%20Mag%20Anomaly.gif Global evolution/anomaly of the Earth's magnetic field] Sweeps are in 10 degree steps at 10 years intervals. Based on data from: The Institute of Geophysics, [http://www.ethz.ch/index_EN ETH Zurich]