{"created": {"type": "/type/datetime", "value": "2009-12-11T03:54:36.147028"}, "subject_places": ["Mississippi River"], "subjects": ["Maps", "Topographical surveying"], "latest_revision": 4, "key": "/works/OL11036258W", "title": "Survey of Mississippi, Saint Croix, Chippewa, and Wisconsin Rivers. Letter from the Secretary of War, transmitting report on surveys of Mississippi, Saint Croix, Chippewa, and Wisconsin Rivers", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL4521280A"}}], "type": {"key": "/type/work"}, "last_modified": {"type": "/type/datetime", "value": "2012-05-02T19:14:14.935071"}, "revision": 4}