Items where Author is "Nainggolan, O."
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Hapsari, D., Nainggolan, O. & Kusuma, D. 
ORCID: 0000-0002-1909-9341 (2020).
Hotspots and Regional Variation in Smoking Prevalence Among 514 Districts in Indonesia: Analysis of Basic Health Research 2018.
Global Journal of Health Science, 12(10),
doi: 10.5539/gjhs.v12n10p32