{"created": {"type": "/type/datetime", "value": "2009-12-10T20:48:28.032233"}, "subjects": ["Steel", "Ironwork", "Manufactures", "Metal-work"], "latest_revision": 4, "key": "/works/OL7288256W", "title": "A treatise on the progressive improvement and present state of the manufactures in metal", "authors": [{"type": "/type/author_role", "author": {"key": "/authors/OL2135595A"}}], "type": {"key": "/type/work"}, "last_modified": {"type": "/type/datetime", "value": "2020-08-11T10:00:10.181958"}, "covers": [5757286], "revision": 4}