Uitgeverij Jan Mets, Amsterdam, 1995Website: Dutch Royal HouseWebsite: Dutch ministry of Foreign AffairsWebsite: International Civic HeraldryWebsite: Nassau - Ottonian Line* ملفات التاريخ: Rulers of Nassau* ملفات التاريخ: Rulers of the Netherlands* شعارات مقاطعات هولندا
Uitgeverij Jan Mets, Amsterdam, 1995Website: Dutch Royal HouseWebsite: Dutch ministry of Foreign AffairsWebsite: International Civic HeraldryWebsite: Nassau - Ottonian Line* The History Files: Rulers of Nassau* The History Files: Rulers of the Netherlands==External links==