{"last_modified": {"type": "/type/datetime", "value": "2011-06-10T01:01:01.009647"}, "title": "Aircraft under jurisdiction of departments. Letter from the Secretary of War, transmitting reports from the War Department, Navy Department, and the Post Office Department, showing aircraft on hand as of November 1, 1919", "created": {"type": "/type/datetime", "value": "2009-12-11T04:00:27.469479"}, "subjects": ["Air mail service", "United States", "United States. Navy Dept", "United States. Post Office Dept"], "latest_revision": 4, "key": "/works/OL11083448W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL184870A"}}], "type": {"key": "/type/work"}, "revision": 4}