Feasibility study for the creation of an eco-friendly block factory using coffee husk ash and corn husks in the municipality of Pamplona, Norte de Santander. ISS [Internet]. 2022 Dec. 2 [cited 2025 Oct. 16];1(3):1-8. Available from: https://ojs.unipamplona.edu.co/index.php/iss/article/view/2408