{"first_publish_date": "1963", "last_modified": {"type": "/type/datetime", "value": "2012-02-10T07:44:24.252288"}, "title": "Pennsylvanian invertebrates of the Mazon Creek area, Illinois", "created": {"type": "/type/datetime", "value": "2009-12-09T21:07:26.698823"}, "covers": [5891593], "lc_classifications": ["QE1 .F4 v. 12, no. 6"], "latest_revision": 4, "key": "/works/OL1333261W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL135959A"}}], "type": {"key": "/type/work"}, "subjects": ["Eurypterida", "Paleontology"], "revision": 4}