International Geographical Union. Working Group on Historical Changes in Spatial Organization Bezüge im Wissensnetz Verfasst (2) DNB-Titeldaten Meeting of the IGU Working Group on Historical Changes in Spatial Organization Pre-congress symposium Creator (2) DNB-Titeldaten Meeting of the IGU Working Group on Historical Changes in Spatial Organization Pre-congress symposium Administrative Überordnung der Körperschaft (1) GND-Körperschaften Internationale Geographische Union