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Setyadi RMZ, Natadiwijaya IF. Uji Empiris Kualitas Instrumen Achievement Test Sistem Peredaran Darah. J. Educ. Res. [Internet]. 2026 Feb. 16 [cited 2026 May 31];7(1):80-5. Available from: https://mail.jer.or.id/index.php/jer/article/view/3035