{"covers": [6243290], "first_publish_date": "1975", "latest_revision": 4, "key": "/works/OL2592958W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL372369A"}}], "subjects": ["Air", "Air quality management", "Law and legislation", "Pollution"], "created": {"type": "/type/datetime", "value": "2009-12-10T00:01:14.241132"}, "title": "Clean Air Act of Montana (with revisions, effective as of July 1, 1975)", "last_modified": {"type": "/type/datetime", "value": "2012-08-03T12:08:26.061674"}, "type": {"key": "/type/work"}, "revision": 4}