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Syahrul, Fariani and Isfandiari, M.Atoillah and Wahyuni, Chatarina Umbul (2017) The Prevalence of Intestinal Bacteria due to Hand Washing Habit and Snacking among Elementary School in Surabaya. Dama International Journal of Researchers (DIJR), 2 (3). pp. 33-36. ISSN 2343-6743