{"subjects": ["Air", "Pollution", "Law and legislation", "Reformulated gasoline", "Government policy", "Environmental aspects", "Motors", "Exhaust gas", "Maintenance and repair", "Motor vehicles", "Inspection", "Atmospheric ozone", "Air quality", "Standards"], "key": "/works/OL76103W", "title": "Clean Air Act amendments", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL18485A"}}], "type": {"key": "/type/work"}, "covers": [4588995], "latest_revision": 5, "revision": 5, "created": {"type": "/type/datetime", "value": "2009-10-16T10:05:09.889767"}, "last_modified": {"type": "/type/datetime", "value": "2025-07-20T12:25:43.046462"}}