{"title": "Plane Trigonometry", "subjects": ["Plane trigonometry", "Textbooks"], "key": "/works/OL5595879W", "authors": [{"author": {"key": "/authors/OL1346970A"}, "type": {"key": "/type/author_role"}}, {"author": {"key": "/authors/OL887601A"}, "type": {"key": "/type/author_role"}}], "type": {"key": "/type/work"}, "covers": [13142290, 15038853], "latest_revision": 7, "revision": 7, "created": {"type": "/type/datetime", "value": "2009-12-10T10:43:02.983416"}, "last_modified": {"type": "/type/datetime", "value": "2025-08-08T09:12:04.382972"}}