{"type": {"key": "/type/work"}, "title": "Tractatvs de proportionvm instrvmento, quod merito compendium vniuersae geometriae dixeris", "subjects": ["Mathematical instruments", "Geometry", "Early works to 1800"], "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1287184A"}}, {"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL5292369A"}, "role": "Editor"}], "key": "/works/OL45293164W", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2026-05-01T13:50:53.111589"}, "last_modified": {"type": "/type/datetime", "value": "2026-05-01T13:50:53.111589"}}