Regalado, R. A. A., Ulanday, R. L. P., Marte, C. J. B., & Francia, J. J. R. (2023). Eco-air purifier using air filter with activated carbon. BOHR International Journal of Civil Engineering and Environmental Science, 1(2), 87–91. https://doi.org/10.54646/bijcees.2023.11