by the Basque Regional Govt (site in Spanish) Report for Correction Measures on the Bidasoa (link to Pdf, site in Spanish) Briefing on the Bidasoa by an Agency of the Navarrese Regional Govt (site in Spanish) Bidasoa-Txingudi Geographical descriptive account of the Lower Bidasoa region by Geological Research Agency (site in Basque) Bidasoa Rivers of Navarre Rivers of the Basque Country (autonomous community) International rivers of Europe Gipuzkoa France–Spain border Rivers of Nouvelle-Aquitaine Rivers of Pyrénées-Atlantiques Rivers of Spain Border rivers