Siregar, Batumahadi, Department of Mechanical Engineering Education, Universitas Negeri Medan, Medan, Indonesia, Indonesia

• Vol 3, No 2: July 2019 - Articles
  UTILIZATION OF ORGANIC WASTE TO ORGANIC FERTILIZER IN THE ELEMENTARY SCHOOLS OF SIJUNJUNG DISTRICT
  Abstract  PDF

p-ISSN: 2549-1849

e-ISSN: 2549-3434