Rajak, Abdul, 		Syahputra, Tri, 		Munir, Muhammad, AND 		Khairurrijal, K..
" The Effect of Nonwoven Microfiber Substrate Polypropylene Thickness to Air Filtration Performance of Polyacrilonitrille Nanofiber" <em>Jurnal ILMU DASAR</em> [Online], Volume 20 Number 2 (16 July 2019)