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Internationale Geographische Union (1923-)(8)
International Geographical Union. Commission on the History of Geographical Thought(5)
International Geographical Union. Commission International Geographical Terminology(4)
International Union of the History and Philosophy of Science (1956-)(4)
Conference on the Standardization of Geographical Names (2. : 1972 : London) (1972-)(3)
Leibniz-Institut für Länderkunde (39)