G.O. Dickson, Pitman, Heirtzler Magnetic Anomalies in the South Atlantic and Ocean Floor Spreading, J. Geophys Research, Band 73, 1968, S. 2087–2100, Pitman, Herron, Heirtzler Magnetic Anomalies in the Pacific and sea floor spreading, Journal of Geophysical Research, Band 75, 1968, S. 2069–2086. Zusammenfassung in Heirtzler, Pitman, Dickson, Herron, Le Pichon Marine magnetic anomalies, geomagnetic field reversals and motion of the ocean floor and continents, J. Geophys. Res., Band 73, 1968, S. 2119–2136, Artikel von Heirtzler in Science Citation Classics dazu, pdf