1. National Museum of Natural History, Bulgarian Academy of Sciences, Tsar Osvoboditel 1, Sofia 1000, Bulgaria
2. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, No 40 Beijing Road, Urumqi 830011, Xinjiang, P.R. China
3. International Wildlife Consultants, Ltd., PO Box 19, Carmarthen, SA33 5YL UK