F. ZWAIED, Ahood; H. MAHMOOD , Yaseen. Increased Stepped Solar Stilled Efficiency by Adding Natural Materials . Tikrit Journal of Pure Science, [S. l.], v. 30, n. 6, p. 83–88, 2025. DOI: 10.25130/tjps.v30i6.1892. Disponível em: https://tjpsj.org/index.php/tjps/article/view/1892. Acesso em: 26 jan. 2026.