Mohd Sidin S, Radin Mohamed RMS. Potential Studies of Permeable Concrete With Palm Oil Fuel Ash (POFA) in Treating Laundry Greywater. rtcebe [Internet]. 2021 Jun. 1 [cited 2024 May 7];2(1):236-44. Available from: https://publisher.uthm.edu.my/periodicals/index.php/rtcebe/article/view/1834