1. The Control of Obsidian Blades at San Lorenzo Open Access Author: Edward, James Bernard Title: The Control of Obsidian Blades at San Lorenzo Area of Honors: Archaeological Science Keywords: ArchaeologyAnthropologyOlmecObsidianBladesFlakes File: Download Edward_James_TheControlofObsidianBladesatSanLorenzo.pdf Thesis Supervisors: Kenneth Gale Hirth, Thesis SupervisorTimothy Michael Ryan, Thesis Honors Advisor