INVESTIGATION OF SOME MECHANICAL PROPERTIES FOR NATURAL (EGGSHELL) AND INDUSTRIAL (CALCIUM CARBONATE) MATERIAL / REINFORCED WITH GLASS FIBER WITH POLYMER COMPOSITE. Journal of Engineering and Sustainable Development, [S. l.], v. 24, n. 6, p. 137–141, 2020. DOI: 10.31272/jeasd.24.6.12. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/99.. Acesso em: 5 may. 2024.