Looking for contributions in a new special issue "Certification and Reporting for Sustainable Tourism", edited by Prof. Dr. Dagmar Lund-Durlacher and Prof. Dr. Wolfgang Stasdas. Read more at: http://www.mdpi.com/journal/sustainability/special_issues/crst …pic.twitter.com/k3jQdWnnOQ
1:07 AM - 17 Jul 2018
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