PLoS ONE, Vol 9, Iss 9, p e107982 (2014) PLoS ONE PloS one, vol 9, iss 9 Munson, J; Amati, V; Collard, M; & Macri, MJ. (2014). Classic maya bloodletting and the cultural evolution of religious rituals: Quantifying patterns of variation in hieroglyphic texts. PLoS ONE, 9(9). doi: 10.1371/journal.pone.0107982. UC Davis: Retrieved from: http://www.escholarship.org/uc/item/28r90115