Espinosa, Allen A., Rebecca C. Nueva España, and Arlyne C. Marasigan. “Investigating Pre-Service Chemistry Teachers’ Problem Solving Strategies: Towards Developing a Framework in Teaching Stoichiometry”. Journal of Education in Science, Environment and Health 2, no. 2 (July 30, 2016): 104–124. Accessed September 21, 2024. https://jeseh.net/index.php/jeseh/article/view/22.