A. Al-Alaf, A. and Gh. Al-Banaa, R. 2005. The Investigations of Gypsum Rocks Outcrops in Sheikh-Ibrahim Anticline by Ratio Images. Rafidain Journal of Science. 16, 6 (May 2005), 77–90. DOI:https://doi.org/10.33899/rjs.2005.41841.