BIBLIOGRAPHY CONTRIBUTOR Giyas Umarov First name Giyas Last name Umarov Bibliography entries by this contributor Umarov, Giyas. 1973. Abu Rayhon Beruniy, Nikolay Kopernik Wa Hozirgi Zamon Fani. Tashkent. Umarov, Giyas. 1973. Beruni, Kopernik I Sovremennaya Nauka. Tashkent.