Koko: A Talking Gorilla (1978)

Elenco

• 

  Penny Patterson

  Herself

• 

  Koko

  Herself

• 

  Saul Kitchener

  Himself - Director Emeritus, San Francisco Zoo

• 

  Carl Pribram

  Himself - Professor of Neuroscience

• 

  Roger Fouts

  Himself