Samal, M. ., S. L. Lama, S. . Luitel, and A. . Ghimire. “A Pilot Scale Study of Greywater Treatment Using Gravel Sand Followed by Granular Activated Carbon”. Kathmandu University Journal of Science Engineering and Technology, vol. 14, no. 2, Dec. 2020, doi:10.70530/kuset.v14i2.486.