Using Analytical Hierarchy Process (AHP) for Prioritizing and Ranking of Ecological Indicators for Monitoring Sustainability of Ecotourism in Northern Forest, Iran Journal title: Ecologia Balkanica Authors: Godratollah Barzekar, Azlizam Aziz, Manohar Mariapan, Mohd Ismail, Syed Hosseni Subject(s): Biological Sciences, Ecology