| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1980 | 978-84-7407-086-6 | Historia general del Pais Vasco (Spanish Edition) | |
| 1981 | 978-84-7407-109-2 | Enciclopedia historico-geografica de Vizcaya (Spanish Edition) | |
| 1983 | 978-84-7407-162-7 | Enciclopedia de La Rioja (Spanish Edition) | |