Catastrophic Decline of World's Largest Primate: 80% Loss of Grauer's Gorilla (Gorilla beringei graueri) Population Justifies Critically Endangered Status. oleh Andrew J Plumptre, Stuart Nixon, Deo K Kujirakwinja, Ghislain Vieilledent, Rob Critchlow, Elizabeth A Williamson, Radar Nishuli, Andrew E Kirkby, Jefferson S Hall