1 9 9 3 . ▁ ▁Works ▁Say ı l ı ' s ▁works ▁have ▁been ▁published ▁in ▁Turkish , ▁English , ▁Arab ic ▁and ▁Pers ian . ▁ ▁The ▁Observ atory ▁in ▁Islam , ▁Ar no ▁Press , ▁June ▁ 1 9 8 1 , ▁part ▁of ▁The ▁Development ▁of ▁Science : ▁S ources ▁for ▁the ▁History ▁of ▁Science ▁Series ; ▁▁ ▁Abd ül ham id ▁ İ bn - T ür k ' ün ▁kat ı ş ı k ▁den k le ml erde ▁mant ı k î ▁zar ure t ler ▁ad l ı ▁y az ı s ı ▁ve ▁z aman ı n ▁c eb ri ▁( Log ical ▁necess ities ▁in ▁mixed ▁equations ▁by ▁ ʿ Ab d ▁al ▁ Ḥ am î d ▁I bn ▁Turk ▁and ▁the ▁algebra ▁of ▁his ▁time ); ▁repr int ▁of ▁the ▁ed . ▁An k ara , ▁Tür k ▁T ari h ▁Kur um u ▁Bas ı me vi , ▁ 1 9 6 2 , ▁Inst . ▁for ▁the ▁History ▁of ▁Arab - I sl am ic ▁Science , ▁Frankfurt ▁am ▁Main , ▁ 1 9 9 7 . ▁ ▁References ▁ ▁Category : 1 9 1 3 ▁birth s ▁Category : 1 9 9 3 ▁death s ▁Category : Har vard ▁University ▁al umn i ▁Category : T urk ish ▁academ ics ▁Category : T urk ish ▁histor ians ▁Category : H istor ians ▁of ▁science ▁Category : Middle ▁Eastern ▁studies ▁sch ol ars ▁Category : An k ara