Items where Author is "Vierto Irennius Girsang"
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Vierto Irennius Girsang and Friska Vaulina Manik and Seri Asnawati Munthe (2019) Determinants of roundworms among primary school students in North Sumatera Province, Indonesia. Malahayati International Journal of Nursing and Health Science, 2 (2): 8. pp. 86-91. ISSN 2620-9152