urn:ddi:de.dezim:15ac6ea9-4c36-4bad-b9fb-2fd613ba918f:1 de.dezim 15ac6ea9-4c36-4bad-b9fb-2fd613ba918f 1 extension:ShouldCalculateFrequenciesForValidValues False extension:ShouldCalculateFrequenciesForInvalidValues False el-masri@dezim-institut.de Version 1 bs1par004 Versanddatum Erstanschreiben (postalisch) Mailing date first invitation (letter)