Investigation of spatial and temporal variability of atmospheric precipitation of beta-active radionuclides in the black sea regions of Crimea in 1997 – 2001 18.10.202018.01.2011 by Светлана Малахатко A. I. Ryabinin, V. Yu Erkulov, Y. P. Ilyin, S. A. Shibaeva, G. F. Laborers Full text in PDF(RUS)