Gorilla uses sign language to communicate with zoo visitors - YouTube
Free American Sign Language Course - Koko the Gorilla speaking in sign language! >>>>>https://bit.ly/2m8pjEL | Facebook
Conversations with Koko: an audience with world's favourite 'talking' gorilla
Why Koko the Gorilla, Who Mastered Sign Language, Mattered
Dr. Goodall Remembers Koko the Beloved Gorilla
Koko: A Talking Gorilla (1978) | The Criterion Collection
Why Koko the Gorilla, Who Mastered Sign Language, Mattered
Communication – The Gorilla Foundation
Koko, the famous gorilla who learned sign language, to be laid to rest at animal sanctuary - ABC News
Gorilla uses sign language to communicate with zoo visitors - YouTube
How Koko forever changed the way we think about gorillas
Koko the gorilla, born 1971, was able to use sign language and understand spoken English; she was capable of rhyming and had her own pet kitten, which she named 'All Ball'. :
Gorilla
The end of an era': Koko, the gorilla who learned sign language, dies at 46 | CBC News
Koko the Gorilla's Best Moments: From Sign Language to Meeting Mister Rogers - YouTube
Great ape language - Wikipedia
Has any gorilla who knows sign language, e.g. Koko, given any indication that they are aware of how closely related humans are to them? - Quora
Gorilla seeks help using sign language
Koko: Gorilla death coverage rekindles language debate
Sign Language – The Gorilla Foundation
Can primates learn signs and acquire language? | British Deaf News
The Apes Who Learned Sign Language
Watch Koko: The Gorilla Who Talks | Prime Video
Communication – The Gorilla Foundation
What Koko the gorilla could and couldn't do
