218089
xsd:long
approved
2023-01-30T19:17:58+00:00
xsd:dateTime
2009-11-30T15:04:25+00:00
xsd:dateTime
2009-11-30T15:04:25+00:00
xsd:dateTime
0
xsd:long
2010-08-10T14:32:37+00:00
xsd:dateTime
natuurkunde
natuurkunde