Rajak, A., Syahputra, T., Munir, M., & Khairurrijal, K. (2019). The Effect of Nonwoven Microfiber Substrate Polypropylene Thickness to Air Filtration Performance of Polyacrilonitrille Nanofiber. Jurnal ILMU DASAR, 20(2), 95-104. doi:10.19184/jid.v20i2.9658