| [1] | Biological evolution of the Saussurean sign as a component of the language acquisition device - Hurford - 1989 | 86 | |
| [2] | Reflexes of grammar in patterns of language change - Kroch - 1989 | 25 | |
| [3] | Learnability and Cognition: The acquisition of Argument Structure - Pinker - 1989 [ BOOK ] | 16 | |
| [4] | Models of incremental concept formation - Gennari,Langley,Fisher - 1989 | 2 |