- American Geographical Society of New York (1)
- American Historical Association (1)
- Arbeitsgemeinschaft Ausseruniversitärer Historischer Forschungseinrichtungen in der Bundesrepublik Deutschland (1)
- Association of American Geographers (1)
- Bayerische Akademie der Wissenschaften. Kommission für Bayerische Landesgeschichte (1)
- Canadian Association of Geographers (1)
- Clark University (Worcester, Mass.) (1)
- Gesellschaft für Fränkische Geschichte (1)
- Mediaeval Academy of America (1)
- National Council for Geographic Education (1)
- National Council for the Social Studies (1)
- National Council of Geography Teachers (U.S.) (1)
- Rand, Edward Kennard, 1871-1945 (1)
- Royal Geographical Society (Great Britain) (1)
- no value (14)