Last Word - Dr. R. Allen Gardner, the American ethologist who trained a chimpanzee to use sign language - 成人论坛 Sounds
Last Word - Dr. R. Allen Gardner, the American ethologist who trained a chimpanzee to use sign language - 成人论坛 Sounds
Dr. R. Allen Gardner, the American ethologist who trained a chimpanzee to use sign language
Last Word spoke to Senior Lecturer in Primate Behaviour Mary Lee Jensvold
