Koko the Gorilla, Who Used Sign Language and Befriended Mr. Rogers, Dies at 46 - The New York Times
Monkey business: Gorilla's message about global warming was staged | Fox News
Why Koko the Gorilla, Who Mastered Sign Language, Mattered
Muere Koko, la gorila que se comunicaba con lenguaje de señas - El Sol de México | Noticias, Deportes, Gossip, Columnas
Un gorila, a través de signos, manda un mensaje claro y directo: "Proteged a la Tierra' | HAZTE ECO
When Koko the Gorilla Chatted Online | The Franklin Institute
Koko, the gorilla who learned sign language, dies at 46 | CBC Radio
Koko (1971-2018), The Highly Intelligent Gorilla Who Learned to Communicate Through Sign Language
These Photos Of Koko The Gorilla Mourning The Loss Of Robin Williams Are Incredibly Moving
Adiós a Koko, la gorila que hablaba: esta es su historia de vida | Bioguia
Koko the Gorilla issues a warning to humanity over the dangers of climate change | The Independent | The Independent
Murió la gorila Koko | National Geographic
Muere Koko, la gorila que dominaba el lenguaje de signos | Mundo animal | EL PAÍS
The Sweet Story of Koko, the Smartest Gorilla in the World - Exploring your mind
Cuando Koko, la gorila que usaba el lenguaje de signos, "chateó" con más de 10.000 pe
KokoPix Photo Blog – The Gorilla Foundation
Koko the gorilla's friends included Robin Williams, Betty White
Koko, the gorilla who knew sign language, dies at 46
