SELÇUKLU ÖNCESİNDE HORASAN’IN SOSYAL YAPISI; ETNİK UNSURLAR, DİNİ UNSURLAR, DİL YAPISI, SINIFSAL YAPI (Social Structure Of Khorasan Prior To Seljuq: Ethnic And Religious Components, Linguistic And Denominational Structures) - Yunus ARİFOĞLU - | Journal of History School