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Hand sanitizer Otomatis Menggunakan Sensor Ultrasonik Berbasis Atmega 328 Guna Pencegahan Penularan Virus Corona. jisti [Internet]. 2021 Apr. 30 [cited 2026 Aug. 17];4(1):84-91. Available from: https://journal.jisti.unipol.ac.id/index.php/jisti/article/view/81