Lead-214 and bismuth-214 in the surface atmosphere of the Sevastopol region 25.10.202029.01.2010 by Светлана Малахатко G. F. Batrakov, T. V. Chudinovskikh, T. M. Ivanova, A. P. Arbuzova, D. A. Kremenchutsky, V. V. Semenov Full text in PDF(RUS)