Koko the Gorilla, Who Used Sign Language and Befriended Mr. Rogers, Dies at 46 - The New York Times
Koko Dead: Gorilla Used Sign Language, Met Robin Williams - Variety
Is Koko's Clock Ticking? | STANFORD magazine
Koko the Gorilla Dead at 46
Koko, Signing Gorilla, Dies at 46 - Language Magazine
Koko, the famous gorilla who learned sign language, to be laid to rest at animal sanctuary - ABC News
Gorilla seeks help using sign language
Betty White shares touching tribute to Koko the gorilla | Fox News
Why Koko the Gorilla, Who Mastered Sign Language, Mattered
Even Koko the gorilla was sad about Robin Williams' death
KOKO - THE GORILLA WHO TALKS | Did you know there's a talking gorilla? | PBS - YouTube
Koko - The Gorilla Who Talks | PBS
KOKO THE GORILLA WHO TALKS | Preview | PBS - YouTube
Koko Dead: Gorilla Who Knew Sign Language Dies at 46 – The Hollywood Reporter
Koko, the famous gorilla who learned sign language, to be laid to rest at animal sanctuary - ABC News
Koko, the gorilla whose sign language abilities changed our view of animal intelligence, dies at 46 - Los Angeles Times
BBC One - Koko: The Gorilla Who Talks to People, In pictures... - Koko hugs Penny at the Gorilla Foundation, California
Why Koko the Gorilla, Who Mastered Sign Language, Mattered
Koko, Who Learned Sign Language, Love Cats, Dies at 46
