2009-11-30T14:23:35+00:00
xsd:dateTime
approved
2023-06-30T09:01:04+00:00
xsd:dateTime
216088
xsd:long
2009-11-30T14:23:35+00:00
xsd:dateTime
akoestiek @nl
acoustic @en
geluidsleer @nl
acoustic @en
akoestiek @nl