“Estimation of Gypsum- Calcite Percentages Using a Fourier Transform Infrared Spectrophotometer (FTIR), in Alexandria Gypsiferous Soil -Iraq”. Iraqi Journal of Science, vol. 55, no. 4B, July 2023, pp. 1916-2, https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/10789.