{"id":"001439552","type":"article","title":"Provenance Study on Obsidian Artifacts from Helongdadong Site, Jilin Province, Northeast China","publisher":"Center for Obsidian and Lithic Studies, Meiji University","publisher-place":"Nagano","container-title":"COLS International Workshop for Young Scientists","author":[{"family":"Luo","given":"Wugan"}],"issued":{"raw":"2014"}}