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|Full name||Jan Marcus Posthuma|
June 11, 1963 |
Dokkum, Friesland, Netherlands
Jan Marcus Posthuma (born 11 June 1963 in Dokkum, Friesland) is a retired volleyball player from the Netherlands, who represented his native country in three consecutive Summer Olympics, starting in 1988 in Seoul, South Korea.
- (Dutch) Dutch Olympic Committee
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