Ruud, H. . “Some Tasks of the IBTE”. Zede: Journal of Ethiopian Engineers and Architects የኢትዮጵያ መሐንዲሶችና አርክቴክቶች መጽሔት, vol. 1, Jan. 2023, pp. 39-45, https://ejol.aau.edu.et/index.php/ZEDE/article/view/5666.