1. School of Social Work and Hatfield School of Government (Division of Public Administration), Portland State University, Portland, USA
2. Environmental Education Center, Faculty of Education, Beijing Normal University, Beijing, P. R. of China
3. MSW Center, School of Humanities & Social Sciences, University of Science & Technology-Beijing, Beijing, P. R. of China
4. College of Natural Sciences and Mathematics, University of Alaska, Fairbanks, Alaska, USA