Kenneth Hirth Penn State University No description specified. 1-3 (3 Records) Documents The 16th Century Merchant Community of Santa Maria Acxotla, Puebla (2015) The Esperanza to Middle Marcala Phase Subsistence Practices at El Gigante Rockshelter (11,000–7400 cal B.P.) (2018) Obsidian craft production at Teotihuacan: A view from Tlajinga 17 (2016)