23.
, ,
- -
. 30494-96
-
" "
7 1941
. . , . . ,
. . , . . , . . ,
U-Pu-Th
6 , . 16 28 . -23, 25-28 -14(2,3), 15(1), 25, 27-34 -23, 26, 28-33