title: Society for American Archaeology meeting. Following an asphalt trail to ancient Olmec trade routes.
authors.forename: Heather
authors.initials: H
authors.lastname: Pringle
mesh_terms: D001106:Archaeology; D003132:Commerce / Q000266:history*; D049690:History, Ancient; D006801:Humans; D006838:Hydrocarbons; D008800:Mexico
chemical_list: D006838:Hydrocarbons; C006647:asphalt