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