{"title": "Hydronics", "subjects": ["Air conditioning", "Hot-water heating", "Hydronics", "Refrigeration and refrigerating machinery"], "key": "/works/OL4969667W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1072978A"}}], "type": {"key": "/type/work"}, "covers": [13825264], "latest_revision": 3, "revision": 3, "created": {"type": "/type/datetime", "value": "2009-12-10T08:10:06.195547"}, "last_modified": {"type": "/type/datetime", "value": "2023-04-04T12:02:48.772861"}}