voorouders van der Ploeg-Mosterman » Sources » Stamboek der vroegeren en lateren Frieschen Adel https://books.google.nl/books?id=AQ1VAAAAcAAJ&printsec=frontcover&dq=editions:lNIgPWBI44kC&sa=X&ved=0ahUKEwjU_evg1tPpAhWLyqQKHRedA0sQ6AEIMjAB#v=onepage&q&f=false
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