Fitrah Abu Bakar, N.; Norhidayah Abdullah Zawawi, S.; Mohd Zin, R.; Abdul Rahman, N.; Kassim Shaari, N. Characterization of Sand Proppant and Its Improvement via Polyurethane Coating. IJET 2018, 7 (4.18), 390-399. https://doi.org/10.14419/ijet.v7i4.18.21976.