Patterson, FG. (1978). «The gestures of a gorilla: language acquisition in another pongid.» 1 ed. Brain and Language. 5: 72–97. PMID618570. doi:10.1016/0093-934X(78)90008-1
Patterson, FG. (1978). «The gestures of a gorilla: language acquisition in another pongid.» 1 ed. Brain and Language. 5: 72–97. PMID618570. doi:10.1016/0093-934X(78)90008-1