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Shafina, Dina and Lengkana, Dewi and Jalmo, Tri and Maulina, Dina (2020) THE EFFECTIVENESS OF CREATIVE PROBLEM SOLVING ON LOGICAL THINKING ABILITY AND MASTERY OF CONCEPTS. Jurnal Pena Sains Vol. 7, No. 1, Month, Year, 07 (01). pp. 40-45. ISSN e-ISSN: 2527-7634