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Farihah, Umi and Septiadi, Dimas Danar and Mukhlis, M and Hariati, A and Kurnia, E K Korespondensi lengkap artikel: Online learning system during pandemic covid-19 at supporting mathematics literacy: problem face by Islamicbased school at junior high level at Jember, Indonesia. UIN KHAS Jember. (Unpublished)