“DEVELOPING AN ENVIRONMENT-BASED SCIENCE TEXTBOOK: ITS RELEVANCE AS A REINFORCEMENT FOR THE CHARACTER OF ENVIRONMENT CARE”. Primary: Jurnal Pendidikan Guru Sekolah Dasar, vol. 9, no. 5, Oct. 2020, pp. 738-50, https://doi.org/10.33578/jpfkip.v9i5.8032.