@article{1986573, title={Geomagnetic Temporal Change}, author={R. A. LANGEL and D. J. KERRIDGE and D. R. ARRACLOUGH and S. R. C. MALIN}, journal={Journal of geomagnetism and geoelectricity}, volume={38}, number={6}, pages={573-597}, year={1986}, doi={10.5636/jgg.38.573} }