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- ‘She taught me so much’: Grieving trainer of Koko, the gorilla who learned sign language ABC News
- Koko the Gorilla, Known for Using Sign Language, Dies at 46 New York Times
- Koko, the beloved gorilla that learned to communicate using sign language, has died Washington Post
- The Gorilla Foundation is sad to announce the passing of our beloved Koko | koko.org Koko.org
- Koko the Gorilla Wasn’t Human, But She Taught Us So Much About Ourselves TIME
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