*International Union for Conservation of Nature and Natural Resources (ed.) 2012. IUCN Red List Categories and Criteria. Version 3.1. Second edition. IUCN, Gland (Schweiz) und Cambridge. | *International Union for Conservation of Nature and Natural Resources (ed.) 2012. IUCN Red List Categories and Criteria. Version 3.1. Second edition. IUCN, Gland (Schweiz) und Cambridge. |