Here some links we find of value because these pay attention to diatonic accordion, bagpipes or Dutch tradional music in general:

Stichting Volkmuziek Nederland  to find more information about folkmusic in the Netherlands
Harmonicahoek to find more information about the diatonic accordion in the Netherlands
- Stichting Doedelzak en Draailier  to find more information about the bagpipe and hurdy-gurdy
De Gelderse Roos have made the Medieval costumes of Roald, Ariëtte and Judica
Balfolk Wageningen more informations about our bal at Wageningen
Balfolk.nl to view all balfolks in the Netherlands
www.simonplantinga.nl/oude-en-nieuwe-hollantse-boerenlieties-en-contredansen/ to view the complete Boerenlieties