Strode, G., Morgan, J. D., Thornton, B., Mesev, V., Rau, E., Shortes, S. and Johnson, N. (2020) “Operationalizing Trumbo’s Principles of Bivariate Choropleth Map Design”, Cartographic Perspectives, 0(94), pp. 5-24. doi: 10.14714/CP94.1538.