Carmela Denise Isberto, Krystoffer Lloyd Labra, Jan Marielle B. Landicho, and Richard De Jesus. 2018. “OPTIMIZED PREPARATION OF RICE HUSK ASH (RHA) AS A SUPPLEMENTARY CEMENTITIOUS MATERIAL”. GEOMATE Journal 16 (57):56-61. https://geomatejournal.com/geomate/article/view/2810.