{"first_publish_date": "1978", "dewey_number": ["557.73/08 s", "551.7/31"], "last_modified": {"type": "/type/datetime", "value": "2012-08-20T14:47:23.009720"}, "title": "The Platteville and Galena groups in northern Illinois", "created": {"type": "/type/datetime", "value": "2009-12-09T20:47:08.478320"}, "covers": [7234541], "subject_places": ["Illinois"], "lc_classifications": ["QE105 .A45 no. 502", "QE660 .A45 no. 502"], "latest_revision": 4, "key": "/works/OL1224628W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL123609A"}}], "subject_times": ["Ordovician"], "type": {"key": "/type/work"}, "subjects": ["Geology", "Geology, Stratigraphic", "Stratigraphic Geology"], "revision": 4}