{"first_publish_date": "1904", "last_modified": {"type": "/type/datetime", "value": "2012-08-09T21:25:48.158645"}, "title": "Territorial and commercial expansion of the United States, 1800-1903", "created": {"type": "/type/datetime", "value": "2009-12-11T10:40:25.796629"}, "covers": [6119277], "lc_classifications": ["E179 .U57"], "latest_revision": 5, "key": "/works/OL13799882W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL2389179A"}}], "type": {"key": "/type/work"}, "subjects": ["Commerce", "Statistics", "Territorial expansion"], "revision": 5}