HUYGENS, Christiaan

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Netherlands 1928


Netherlands 1955


Netherlands 1962


Comoros 1975


Netherlands 1987


Netherlands 1988


Grenada 2000


Djibouti 2006


Mali 2006


Guinea 2007


Guinea 2007


Sao Tome and Principe 2008


Guinea-Bissau 2009


Rwanda 2009


Mali 2011