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2. Republic of Indonesia, Presidential Regulation of Indonesia Republic Number 80/2019: Acceleration of Economic Development in the Gresik-Bangkalan-Mojokerto-Surabaya-Sidoarjo-Lamongan Area, Bromo-Tengger-Semeru Area, Selingkar Wilis Area and South Cross Areas (In Indonesian), (2019).
3. Rail-road crossing impacts: an international synthesis
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5. Supriadi U., Railway Line Capacity and Its Problems (In Indonesia), Bandung, (2008).