Akgul, Mesut, A. Ali Isildar, and Levent Basayigit. 2016. “Relationships Between Color and Some Properties in Red-Reddish and Neighbour Soils in Isparta, Turkey”. Asian Journal of Chemistry 17 (3):1995-2000. https://asianpubs.org/index.php/ajchem/article/view/14097.