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ON THE EXTERNAL PART OF THE GEOMAGNETIC SECULAR VARIATIONS OF D AND H AT WINGST OBSERVATORY (ERDMAGNETISCHES OBSERVATORIUM WINGST) = SUR LA PARTIE EXTERIEURE DES VARIATIONS GEOMAGNETIQUES DE D ET H A L'OBSERVATOIRE GEOMAGNETIQUE DE WINGSTVOPPEL D.1982; DTSCH. HYDROGR. Z.; ISSN 0012-0308; DEU; DA. 1982; VOL. 35; NO 4; PP. 169-176; ABS. GER/FRE; BIBL. 9 REF.; ILL.Article

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