Thomas Garrison University of Southern California No description specified. 1-3 (3 Records) Documents Crossing Ancient and Modern Borders: Territoriality in the Three Rivers Region (2015) Hilltops and Boundaries: The LiDAR Survey of El Zotz and Tikal (2017) Pyramids, Plazas, and Walls: Hilltop Settlements at the Periphery of El Zotz, Guatemala (2016)