Guffey, S. K., T. F. Slater, and S. J. Slater. “Development Of The EGGS Exam Of GeoloGy Standards To Measure Students’ Understanding Of Common Geology Concepts”. Journal of Astronomy &Amp; Earth Sciences Education, vol. 4, no. 1, June 2017, https://journals.modernsciences.org/index.php/JAESE/article/view/79.