Musicology / Musical Theatre / Opera / Musical Semiotics / Spanish Music / Zarzuela / Musical Theatre, Music Theory, Composition / Semiótica musical / Opera Studies / Historia Contemporánea de España / Musicologia, Teatro musicale / Opera, Operetta, and Musical Theatre / Teatro Musical / ópera / Nacionalismo Musical / Musical Nationalism / Basque Music / Pablo Sorozábal / Zarzuela / Musical Theatre, Music Theory, Composition / Semiótica musical / Opera Studies / Historia Contemporánea de España / Musicologia, Teatro musicale / Opera, Operetta, and Musical Theatre / Teatro Musical / ópera / Nacionalismo Musical / Musical Nationalism / Basque Music / Pablo Sorozábal