Kubaev Asaliddin Esirgapovich, Xudaykulova Shoira Narzullaevna, & Muhammadkulova Moxibonu Komiljonovna. (2021). EFFECTIVENESS OF PREPARATION AND USE OF MANUALS, ELECTRONIC TEXTBOOKS. International Engineering Journal For Research & Development, 6(ICIPPS21), 2. https://doi.org/10.17605/OSF.IO/TWYKN