26th exchange of knowledge of cities and communities up to 30,000 inhabitants in the area of the “Struktur- und Genehmigungsdirektion Nord” (structure and approval management North) at site of the Betzdorf Wastewater Disposal on 10th March 2011.
26th exchange of knowledge of cities and communities up to 30,000 inhabitants in the area of the “Struktur- und Genehmigungsdirektion Nord” (structure and approval management North) at site of the Betzdorf Wastewater Disposal on 10th March 2011.
