Ponduri, Samatha, and M. Rama Rao. “Cost Benefit Analysis of Flexible and Rigid Pavements of Rural Roads Using Rice Husk Ash and Stone Dust As Additives”. International Journal of Engineering & Technology, vol. 7, no. 4, May 2019, pp. 6252-65, https://doi.org/10.14419/ijet.v7i4.29018.