Juan Manuel Bilbao Azkarreta, also known as Jon Bilbao or Jon Bilbao Azkarreta (31 October 1914 – 23 May 1994) was a university instructor, a bibliographer, and an activist for Basque nationalism. He compiled the bibliographic section of the ''Enciclopedia general ilustrada del País Vasco'' (1970), and the monumental ''Eusko-bibliographia: diccionario de bibliografía vasca'' (10 volumes, 1970–1981, with further supplements), which has been described as "one of the most significant reference works on Basque studies".
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