Owaid, Haider M., Muna M. Al-Rubaye, and Haider M. Al-Baghdadi. 2021. “Use of Waste Paper Ash or Wood Ash As Substitution to Fly Ash in Production of Geopolymer Concrete”. Scientific Review Engineering and Environmental Sciences (SREES) 30 (3):464-76. https://doi.org/10.22630/PNIKS.2021.30.3.39.