{"lc_classifications": ["QE75 .B9 no. 606"], "key": "/works/OL1556920W", "created": {"type": "/type/datetime", "value": "2009-12-09T21:51:37.250085"}, "title": "Origin of the zinc and lead deposits of the Joplin region, Missouri, Kansas, and Oklahoma", "id": 36735299, "subject_places": ["Joplin region"], "first_publish_date": "1915", "latest_revision": 2, "last_modified": {"type": "/type/datetime", "value": "2010-01-31T03:06:53.463322"}, "authors": [{"type": "/type/author_role", "author": {"key": "/authors/OL165987A"}}], "type": {"key": "/type/work"}, "subjects": ["Zinc mines and mining", "Lead mines and mining"], "revision": 2}