A B Abdullahi, A B Abdullahi and A R Siregar, A R Siregar and W Pakiding, W Pakiding and Mahyuddin, Mahyuddin (2021) The analysis of BOD (Biological Oxygen Demand) and COD (Chemical Oxygen Demand) contents in the water of around laying chicken farm. IOP Conf. Series: Earth and Environmental Science 788.
A B Abdullahi, A B Abdullahi and A R Siregar, A R Siregar and W Pakiding, W Pakiding and Mahyuddin, Mahyuddin (2021) The analysis of BOD (Biological Oxygen Demand) and COD (Chemical Oxygen Demand) contents in the water of around laying chicken farm. IOP Conf. Series: Earth and Environmental Science.