The History of Terrorism
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Finnish chemists
Olavi Erämetsä
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Olavi Erämetsä - Wikipedia
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1849-2011 Helsinki University of Technology (TKK or HUT)
20th-century Finnish people
20th-century Geologists
20th-century Russian chemists
Discoverers of chemical elements
Finnish Academy of Science and Letters
Finnish chemists
Finnish geologists
Finnish mineralogists
Rare earth scientists
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Promethium