2009-11-30T14:16:04+00:00
xsd:dateTime
2009-11-30T14:16:04+00:00
xsd:dateTime
215722
xsd:long
approved
2023-06-30T09:01:44+00:00
xsd:dateTime
bewegingsleer @nl
kinetics @en
bewegingsleer @nl
kinetics @en