Tjalling Charles Koopmans, n.
United States economist (born in the Netherlands) (1910-1985)
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Koopmans Tjalling Charles Koopmans Tjalling Koopmans
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United States economist (born in the Netherlands) (1910-1985)
<noun.person>
Koopmans Tjalling Charles Koopmans Tjalling Koopmans