BIBLIOGRAPHY CONTRIBUTOR A.P. Yushkevicha First name A.P. Last name Yushkevicha Bibliography entries by this contributor al-Kāshī, Jamshīd ibn Mas‘ūd. 1956. Klyuch Aritmetiki, Traktat Ob Okruzhnosti. Eds. V. G. Segalya, Yushkevicha, A.P., and Rozenfel’da, B. A. Tran. B. A. Rozenfel’da. Moscow: N/A.