H. A. S. Razvanchy, and M. A. Fayyadh. “STUDY SOIL DEVELOPMENT AND CLASSIFICATION IN ERBIL PROVINCE, KURDISTAN, IRAQ USING MATHEMATICAL INDICES”. IRAQI JOURNAL OF AGRICULTURAL SCIENCES 54, no. 6 (December 29, 2023): 1802–1813. Accessed November 22, 2024. https://jcoagri.uobaghdad.edu.iq/index.php/intro/article/view/1879.