{"type": {"key": "/type/work"}, "title": "The American railroad in laboratory", "subjects": ["Railroads", "Research", "Safety measures", "Railroad accidents"], "subject_places": ["United States"], "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL5107696A"}}], "key": "/works/OL38697487W", "latest_revision": 2, "revision": 2, "created": {"type": "/type/datetime", "value": "2024-07-18T12:19:14.446489"}, "last_modified": {"type": "/type/datetime", "value": "2025-11-01T04:18:19.104494"}}