Gorillas on Thin Ice. United Nations Environment Programme (15 January 2009). Arkivita el la originalo je 2016-05-18. Alirita 19a Majo 2010 .
Arkivita kopio. Arkivita el la originalo je 2016-05-18. Alirita 2014-09-24 .: "The Eastern Lowland Gorilla population in the DRC has plummeted dramatically over the last 10 years, with probably only about 5,000 of the formerly 17,000 animals remaining."
unep.org
Gorillas on Thin Ice. United Nations Environment Programme (15 January 2009). Arkivita el la originalo je 2016-05-18. Alirita 19a Majo 2010 .
Arkivita kopio. Arkivita el la originalo je 2016-05-18. Alirita 2014-09-24 .: "The Eastern Lowland Gorilla population in the DRC has plummeted dramatically over the last 10 years, with probably only about 5,000 of the formerly 17,000 animals remaining."
web.archive.org
Gorillas on Thin Ice. United Nations Environment Programme (15 January 2009). Arkivita el la originalo je 2016-05-18. Alirita 19a Majo 2010 .
Arkivita kopio. Arkivita el la originalo je 2016-05-18. Alirita 2014-09-24 .: "The Eastern Lowland Gorilla population in the DRC has plummeted dramatically over the last 10 years, with probably only about 5,000 of the formerly 17,000 animals remaining."