Atta , Said Fatouh. “Analysis of The Content of The Fourth-Grade Science Textbook in Basic Education in Libya in Light of The Trends in International Mathematics And Science Study (TIMSS-2015) ”. Al-Mukhtar Journal of Social Sciences, vol. 39, no. 1, Mar. 2021, pp. 118-42, https://doi.org/10.54172/6ddb9z94.