Shamsi Papkiade, Seyedeh Zahra, sarmadi, Mohammadreza, Aminifar, Elahe, Shobeiri, Seyed Mohammad. Content Analysis of Math Textbooks in the First level of Primary School Based on the Components of Sustainability Education with Shannon Entropy Technique. Journal of Environmental Science and Technology. 2021;23(8):107-118. 10.30495/jest.2022.57742.5252