Samh, Idan Attia, and Kamal Salih Ghadeeb. 2020. “The Effect of the Perkins and Blyth Model on the Development of Logical Thinking Among Second-Grade Intermediate Students in Social Studies”. Journal of Tikrit University for Humanities 27 (11):439-59. https://doi.org/10.25130/jtuh.27.11.2020.21.