2009-11-30T14:55:09+00:00
xsd:dateTime
217639
xsd:long
approved
2023-06-30T12:36:13+00:00
xsd:dateTime
2009-11-30T14:55:09+00:00
xsd:dateTime
telegraphy @en
telegrafie @nl
telegraphy @en
telegrafie @nl
radiotelegrafie @nl