Siregar, Hermanto, Professor of Economic and Management Faculty, IPB University Bogor, Indonesia

• ASTONJADRO Vol. 10 No. 2 (2021): ASTONJADRO - Articles
  ANALYSIS OF MOTORCYCLE TRAFFIC SPEED WHICH CREATES NOISE IN FRONT OF WIYATA MANDALA JUNIOR HIGH SCHOOL DURING THE COVID-19 PANDEMIC
  Abstract  IN ENGLISH PDF