Grissom, Carol A., Vicenzi, Edward P., Livingston, Richard A., Aloiz, Emily, Little, Nicole C., Giaccai, Jennifer A., and Freedman, Willa. 2014. "Manganese in Black Crusts on Seneca Sandstone." Microscroscopy and Microanalysis, 20, (3). https://doi.org/10.1017/S1431927614011957.