The Effects of the Substitution of Wood Fiberwith Agro-based Fiber (Barley Straw) on the Properties of Natural Fiber/Polypropylene CompositesMarko Hyvärinen and Timo KärkiMATEC Web of Conferences, 30 (2015) 01014DOI: https://doi.org/10.1051/matecconf/20153001014