Valladolid, María, Mercedes Arauzo, and Luis Jiménez. “Ecological Status of the Rivers Included in the Ordesa Y Monte Perdido National Park (Ebro Basin, Aragón) Using Macroinvertebrate Indexes”. Pirineos 170 (December 30, 2015): e009. Accessed July 27, 2024. https://pirineos.revistas.csic.es/index.php/pirineos/article/view/256.