Khalid, H. ., and A. M. . Abdul Aziz. “Fracture Toughness of Medium Molecular Weight Phenol Formaldehyde (MMwPF) Plywood”. Journal of Advanced Research in Applied Sciences and Engineering Technology, vol. 19, no. 1, Dec. 2020, pp. 21-27, doi:10.37934/araset.19.1.2127.