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zaputra, Riki and Sari, Kumala (2019) THE RELATIONSHIP BETWEEN ANXIETY AND RETENTION TOWARDS LEARNING ACHIEVEMENT REMEDIAL ON MATERI SKELETON SYSTEM IN CLASS VIII SMP NEGERI 30 PEKANBARU ACADEMIC YEAR 2018/2019. Bio-Lectura : Jurnal Pendidikan Biologi, 6 (1). pp. 78-86. ISSN 2598-2427