{"title": "Underwater Machines", "covers": [3047644, 2749588], "key": "/works/OL4181276W", "authors": [{"author": {"key": "/authors/OL792650A"}, "type": {"key": "/type/author_role"}}], "type": {"key": "/type/work"}, "subjects": ["Underwater exploration", "Juvenile literature", "Submersibles", "Machinery, juvenile literature", "Machinery"], "latest_revision": 6, "revision": 6, "created": {"type": "/type/datetime", "value": "2009-12-10T05:34:40.931428"}, "last_modified": {"type": "/type/datetime", "value": "2026-08-14T09:38:45.614765"}}