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Incoming Resources
- 1989 in a global perspective, Ulf Engel, Frank Hadler, Matthias Middell (eds.)
- Theoretiker der Globalisierung, Matthias Middell, Ulf Engel, [Hrsg.]
- Towards an African peace and security regime, continental embeddedness, transnational linkages, strategic relevance, edited by Ulf Engel and João Gomes Porto