Lessons 1 · 1 lessons · B. To‘xliyev, B. Karimov, K. Usmonova. Literature: textbook-collection for Grade 10 of secondary schools and for students of secondary specialised and vocational institutions, Parts 1–2. 1st edition. “O‘zbekiston milliy ensiklopediyasi” State Scientific Publishing House, Tashkent, 2017