14 June 2020, Saxony, Dresden: An original Sachsendreier stamp and the corresponding certificate are on display at Arnold Vaatz, member of the German Bundestag and sworn stamp examiner in the Bund Philatelistischer
Products – International GNSS Service
Poland 2012 - P10 Meertens PR60.pdf - IGS - NASA
RTS Monitoring – International GNSS Service
Isernhagen: IGS und Gymnasium stellen sich online vor
IB Angebot | IGS Ganztagsprogramm im IB-Schülerzentrum Stierstadt