{"title": "Problems of America's Aging Population", "authors": [{"key": "/authors/OL1703449A"}], "publish_date": "June 1951", "physical_format": "Paperback", "publishers": ["Univ Pr of Florida"], "isbn_10": ["0813002133"], "isbn_13": ["9780813002132"], "languages": [{"key": "/languages/eng"}], "subjects": ["Aging", "Congresses", "Older people", "United States"], "type": {"key": "/type/edition"}, "source_records": ["amazon:0813002133"], "key": "/books/OL11348805M", "number_of_pages": 117, "works": [{"key": "/works/OL6433284W"}], "latest_revision": 3, "revision": 3, "created": {"type": "/type/datetime", "value": "2008-04-30T09:38:13.731961"}, "last_modified": {"type": "/type/datetime", "value": "2026-01-31T04:10:26.439487"}}