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21 (08) 1910
.
.
, 7(20),.
, , British Radium Corporation. 550 , - , . . , , , .
, 7(20),.
- 50 000 . - . . , , : , !. .
, 7(20),.
: 66 000 . 15 000 .
1901
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1911
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1915
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