ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Data for the secular variation based on direct observations and archeomagnetism are available only for the past few thousand years. The intensity of the geomagnetic field more than six thousand years ago is scarcely known, particularly during a period of reversed polarity. Demagnetization by ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/212274a0
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