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Syahputra, Yogi and Daulay, Murni and Ruslan, Dede (2019) Analysis of Economic Development Inequality in Sumatera Utara Province. International Journal of Research and Review (IJRR), 6 (12). pp. 331-340. ISSN E-ISSN: 2349-9788; P-ISSN: 2454-2237

Sudibyo, Mufti (2019) The Development of Problem Based Virtual Laboratory Media to Improve Science Process Skills of Students in Biology. International Journal of Research and Review (IJRR), 6 (6). pp. 64-74. ISSN 2349-9788