Abu Ali ibn Sina: expressing time, fractional numerals

Lessons 23 · 1 lessons · O. Ya. Vech, M. Yu. Ivantsova, N. T. Yuldasheva; scientific editor E. A. Khamraeva. Russian as a Foreign Language, Grade 9 (textbook for schools with Uzbek and other languages of instruction). Republican Education Centre, Tashkent, 2022