Nasution, Reni Silvia and Nasution, Darwin Yunus and Marpongahtun (2016) COMPARISON MECHANICAL PROPERTIES OF COMPOSITES POLYMER FROM POLYPROPYLENE WITH VARIOUS SOURCES α-CELLULOSE AS FILLERS. In: The 3rd Annual International Seminar on Trends in Science and Science Education 2016, 7 Oct 2016, Medan.