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Faisal Faisal, Syamsul Alam, Aprilzal Satria Hanafi, Martina Martina |
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Department of Environmental Sanitation, Health Polytechnic of Gorontalo, Indonesia Taman Pendidikan Street, Moodu, Indonesia 96113 Tel. (0435)827182, Fax. (0435)827182 email: jhes@poltekkesgorontalo.ac.id |