Amran@Mohamad Zaki, Umar Adli , Polyols and rigid polyurethane foams produced from the liquefaction of oil palm empty fruit bunch fiber / Umar Adli bin Amran @ Mohamad Zaki. - xvi, 159 pages : illustrations ; 30 cm. Thesis (Ph.D.) - Universiti Kebangsaan Malaysia, 2019. References : page [138-158]. Subjects--Corporate Names: Universiti Kebangsaan Malaysia--Dissertations. Subjects--Topical Terms: Fossil fuels.Biomass energy.Environmental protection.Dissertations, Academic--Malaysia.