Issue MFR 83(3-4), 2021 Author(s) John DeBeer, Fred Nolte, Christopher W. Lord, Javier Colley, Gerson Correa Gonzalez, James Cox, and Jon W. Bell PDF mfr833-41.pdf DOI https://doi.org/10.7755/MFR.83.3-4.1 Supplemental Material