{"first_publish_date": "1997", "latest_revision": 3, "key": "/works/OL1968139W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL236378A"}}], "subjects": ["Environmental aspects", "Environmental aspects of Metals", "Metals", "Pollution", "Trace elements in water", "Water"], "created": {"type": "/type/datetime", "value": "2009-12-09T22:38:30.270940"}, "title": "Metal speciation in the upper Arkansas River, Colorado, 1990-93", "subject_places": ["Arkansas River", "Colorado"], "last_modified": {"type": "/type/datetime", "value": "2010-12-06T07:35:27.340658"}, "type": {"key": "/type/work"}, "revision": 3}