Geonim
Teshuvot HaGeonim
Collection of responsa published from a manuscript discovered in Chevron in the 19th century.
Toratan shel Rishonim
Collection of responsa and a range of other geonic writings, published from manuscripts in the 19th-century.
Epistle of Rav Sherira Gaon
Influential 10th-century letter detailing the development of rabbinic literature from the Mishnah to the Geonim.
Musafia Teshuvot HaGeonim
Collection of responsa and talmudic commentary published from manuscript in the 19th century.