%0 Journal Article %A A. S. Bol'shakov %A G. M. Solodovnikov %T Geomagnetic field intensity in last 400 million year %J Doklady Akademii Nauk %D 1981 %P 1340-1343 %V 260 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_260_6_a13/ %G ru %F DAN_1981_260_6_a13