{"created": {"type": "/type/datetime", "value": "2009-12-10T04:41:59.831491"}, "subject_places": ["United States"], "subjects": ["Air", "Balance of trade", "Coke industry", "Compliance costs", "Costs", "Law and legislation", "Pollution", "Steel industry and trade"], "latest_revision": 2, "key": "/works/OL3864507W", "title": "The effects of the Clean Air Act Amendment of 1990 on the U.S. coke and steel industry and foreign trade balance", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL694550A"}}], "type": {"key": "/type/work"}, "last_modified": {"type": "/type/datetime", "value": "2010-12-04T11:23:25.926100"}, "revision": 2}