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/< sup
1
010 (<
1
037 ± 0
179 ± 0
1
20th century
1
221 (<
1
237 </ sup
1
239 </ sup
1
240 </ sup
241 </ sup
1
277 bq
1
293 bq
1
58 )
1
926 mbq
1
Astronomical and Space Sciences not elsewhere classified
1
Biological Sciences not elsewhere classified
1
Biotechnology
1
Chemical Sciences not elsewhere classified
1
Computational Biology
1
Ecology
Environmental Sciences not elsewhere classified
Inorganic Chemistry
Pharmacology
1
antarctic marine sediments
1
certain region
1
cold climate
1
considerable amount
1
current source
1
different fractionations
1
dominant source
1
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