Salih Hussein F, Salih Fayyadh M. The Effect of the Penteresh and Raguloth Models on the Acquisition of Linguistic Concepts among the Second Intermediate Students and Developing Their Systemic Thinking. Opción [Internet]. 13 de agosto de 2019 [citado 16 de julio de 2024];350:1121-48. Disponible en: https://produccioncientificaluz.org/index.php/opcion/article/view/27604