1.		Partenariats public-privé: un instrument indispensable à la politique du tourisme de pays développés / Peter Keller Autor: Keller, Peter
2.		Structural changes in the market for air transport and the impact on tourism : Introduction / Peter Keller Autor: Keller, Peter
3.		A swot analysis of SMES faced with competition from the travel industry: introduction to seminar / Peter Keler Autor: Keller, Peter