Maulana S, Desnita D, Raihanati R. The Development of Knowledge Enrichment Books Concerning Ice and Snow Physical Studies for High-School Students. jpppf [Internet]. 2018Dec.31 [cited 2024Apr.18];4(2):83 -90. Available from: https://journal.unj.ac.id/unj/index.php/jpppf/article/view/7350