R. Allen Gardner Who Taught Sign Language to a Washoe Dies at 91
Robert Allen Gardner who, with the help of his wife Beatrix "Trixie" Tugendhut, taught Washoe the chimpanzee sign language; has ...
Robert Allen Gardner who, with the help of his wife Beatrix "Trixie" Tugendhut, taught Washoe the chimpanzee sign language; has ...