Loayza, María Luisa, Jorge Aurelio Bravo Cabrejos, Felipe Américo Reyes Navarro, and Rosio Ascuna Arcondo. 2014. “Structural Characterization of Iron Oxides and Hydroxides in the Clay Fraction of Soils from the Inca Civilization Moray Terraces”. Journal of Metals, Materials and Minerals 24 (2). Bangkok, Thailand. https://www.jmmm.material.chula.ac.th/index.php/jmmm/article/view/122.