Selamat, N. et al. 2018. Mechanical Properties of Polypropylene (PP) – Montmorillonite (MMT) Nanocomposites for Pre-Fabricated Vertical Drain (PVD) Application. International Journal of Engineering & Technology. 7, 4.35 (Nov. 2018), 689–692. DOI:https://doi.org/10.14419/ijet.v7i4.35.23090.