%0 Journal Article %A N. D. Baliasnyi %A R. M. Kogan %A M. V. Nikiforov %A O. S. Renne %A Sh. D. Fridman %T Radioisotopic analysis of rocks and soils from the energy spectrum of $\gamma$-rays in the bottom layer of the atmosphere %J Doklady Akademii Nauk %D 1961 %P 807-810 %V 140 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_140_4_a18/ %G ru %F DAN_1961_140_4_a18