STUDY THE ECONOMICAL AND OPTIMUM THERMAL INSULATION THICKNESS OF BUILDING WALLS FOR ENERGY SAVING IN IRAQ: Chemical. Diyala Journal of Engineering Sciences , [S. l.], p. 813–818, 2015. Disponível em: https://www.djes.info/index.php/djes/article/view/417. Acesso em: 1 may. 2025.