Delparte, D. M. ., R. T. . Richardson, K. B. . Eitel, S. . Matsaw, and T. . Cohn. “Promoting Geoscience STEM Interest in Native American Students: GIS, Geovisualization, and Reconceptualizing Spatial Thinking Skills”. International Journal of Learning, Teaching and Educational Research, vol. 15, no. 5, Apr. 2016, pp. 1-15, http://ijlter.myres.net/index.php/ijlter/article/view/930.