{"subjects": ["Gas engineering", "Gas industry", "Gas manufacture and works", "Natural gas"], "key": "/works/OL4487319W", "title": "Gas production operations", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL895942A"}}], "type": {"key": "/type/work"}, "covers": [4234567], "latest_revision": 5, "revision": 5, "created": {"type": "/type/datetime", "value": "2009-12-10T06:29:49.219882"}, "last_modified": {"type": "/type/datetime", "value": "2026-04-25T15:52:11.333962"}}