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Sherira ben Hanina has written:
'The iggeres of Ray Sherira Gaon' -- subject- s -: History, Mishnah, Talmud, Tannaim
'The Iggeres of Rav Sherira Gaon' -- subject- s -: Amoraim, Geonim, History, Mishnah, Saboraim, Talmud, Tannaim
The population of Gundiyat gaon is 1,500.
Rogatchover Gaon died in 1936.
Nessim Gaon was born in 1922.
Rogatchover Gaon was born in 1858.