@article{Cebrián_García Ballesteros_Goycoolea Prado_Arroyo Ilera_Portella_Feo Parrondo_López Trigal_1993, title={Bibliografía}, volume={54}, url={https://estudiosgeograficos.revistas.csic.es/index.php/estudiosgeograficos/article/view/881}, number={213}, journal={Estudios Geográficos}, author={Cebrián, Juan A. and García Ballesteros, Aurora and Goycoolea Prado, Roberto and Arroyo Ilera, Fernando and Portella, Eduard and Feo Parrondo, Francisco and López Trigal, Lorenzo}, year={1993}, month={dic.}, pages={749–769} }