Yerimadesi, Yerimadesi and Bayharti, Bayharti and Guspatni, Guspatni and Ellizar, Ellizar and Andromeda, Andromeda  (2019) Efforts to Improve Competency of Teacher MGMP Chemistry, Padang City Through Training For Development of Teaching Materials Based on Guided Discovery Learning.  Pelita Eksakta, 2 (2).  pp. 121-129.  ISSN Print : 2621-0719 dan Online : 2621-4784