{"description": {"type": "/type/text", "value": "A history of the calendar from the primitive concepts of measuring time used by ancient civilizations to the Gregorian calendar invented in 1582 still used today."}, "covers": [8240611], "last_modified": {"type": "/type/datetime", "value": "2020-10-04T18:46:44.579763"}, "latest_revision": 5, "key": "/works/OL6584842W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1766582A"}}], "created": {"type": "/type/datetime", "value": "2009-12-10T19:24:12.436298"}, "title": "The calendar", "subjects": ["Calendar", "Juvenile literature"], "type": {"key": "/type/work"}, "revision": 5}