Institution: | aDepartment of Geography and Institute of Public and International Affairs, University of Utah, 260 S. Central Campus Dr. Rm. 270, Salt Lake City, UT 84112-9155, United States;bJustus Liebig University Giessen, Senckenbergstr. 1, 35390 Giessen, Germany;cCenter for Yellow River Civilization and Sustainable Development, College of Environment and Planning, Henan University, Kaifeng 475001, China |