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- [6] REVERSALS OF THE EARTHS MAGNETIC-FIELD QUARTERLY JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1986, 27 (03): : 328 - 350
- [9] HUMBOLDT AND THE EARTHS MAGNETIC-FIELD QUARTERLY JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1991, 32 (03): : 279 - 293
- [10] MAGNETIC-FIELD GRADIENTS AND THEIR USES IN THE STUDY OF THE EARTHS MAGNETIC-FIELD JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY, 1991, 43 (07): : 585 - 599