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Jelita Sirait, Lisbet Novianti Sihombing, Sukardo Sitohang. The Influence of Letter Card Media on Learning Outcomes of Class 1 Students in Learning Theme 1 Myself Subtema 2 Me and New Friends at SDN 091277 Pematang Siantar. IJIST [Internet]. 2023 Oct. 31 [cited 2026 Apr. 27];1(4):431-40. Available from: https://www.journal.multitechpublisher.com/index.php/ijist/article/view/635