| 2002 | - | Computational and evolutionary aspects of language - Nowak,Komarova,Niyogi | :: | 31 |
| 1999 | - | The development of language: Acquisition, change and evolution - Lightfoot | :: | 38 |
| 1997 | - | Evolutionary Consequences of Language Learning - Niyogi,Berwick | :: | 26 |
| 1994 | - | A Geography of the Welsh Language - Aitchison,Carter | :: | 1 |
| 1992 | - | The Evolution of Human Languages - Hawkins,Gell-Mann | :: | 13 |
| 1991 | - | Reversing Language Shift - Fishman | :: | 1 |
| 1991 | - | Census: Report for Wales - Office,UK | :: | 1 |
| 1989 | - | Reflexes of grammar in patterns of language change - Kroch | :: | 25 |
| 1984 | - | Gaelic in Scotland 1698-1981: The Geographical History of a Language - Withers | :: | 1 |
| 1957 | - | Syntactic Structures - Chomsky | :: | 36 |