%0 Journal Article %A S. Yu. Khomutov %A I. N. Khomutova %T The possibility of using of the old analog magnetograms of observatories to obtain new data about variations of the Earth's magnetic field %J Vestnik KRAUNC. Fiziko-matematičeskie nauki %D 2016 %P 112-117 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/VKAM_2016_4_a16/ %G ru %F VKAM_2016_4_a16