@article{
  author = {Shokoohi, Reza, Dargahi, Abdollah, Karami, Amir},
  title = {A Survey on Efficiency of Natural Wastewater Treatment Systems and Activated Sludge for Municipal Wastewater Treatment},
  journal = {Journal of Environmental Science and Technology},
  year = {2020},
  volume = {22},
  number = {1},
  pages = {15-25},
  doi = {10.30495/jest.2018.15742.2426}
}