Jumiati, E., 		Nasution, N., & 		Prananda, D.
(2023).
 Reducing Mn Levels from Bore Well Water in Tembung Village by Filtration of Tea Bag Activated Carbon, Zeolite, Silica Sand and Gravel.
<em>BULETIN FISIKA, 24</em>(2), 149 – 153.
doi:10.24843/BF.2023.V24.i02.p12