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Suwarno Suwarno
Program of Geography Education, Universitas Muhammadiyah Purwokerto
Indonesia
Junun Sartohadi
Faculty of Geography,
Universitas Gadjah Mada
Indonesia
Sunarto Sunarto
Faculty of Geography,
Universitas Gadjah Mada
Indonesia
Djarot Sadharto
Faculty of Geography,
Universitas Gadjah Mada
Indonesia