board of education di Medan City, North Sumatra

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BBC

Jalan Jenderal Ahmad Yani, 20713 Kota Binjai, Indonesia

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North Sumatra Provincial Education Department

Madras Hulu, Medan Polonia, 20151 Kota Medan, Indonesia

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Kingston School Medan

Jl. Kapten Sumarsono, Medan, 20124 Kota Medan, Indonesia

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PINEAPPLE PRESCHOOL & KINDERGARTEN

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Pesantren Darul Quran

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Pematang Siantar 12th Public Junior High School

Jalan Dolok Simarjarujung 25, 21142 Kota Pematang Siantar, Indonesia

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Tanah Jawa 1st Public Junior High School

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SMK YP Parbina Nusantara 3

Jalan Lingga No. 32, 21118 Kota Pematang Siantar, Indonesia

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Department of Education and Culture in Medan

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Department of Mechanical Engineering