TY - GENERIC DO - UR - http://dx.doi.org/ TI - An Action Research on the Long-term Implementation of an Engineering-centered PjBL of Sustainable Energy in a Rural Middle School T2 - Preprints AU - Chen, Chin-Sung AU - Lin, Jing-Wen PY - 2021 DA - 2021/07/30 PB - Preprints