{"physical_format": "Hardcover", "last_modified": {"type": "/type/datetime", "value": "2008-04-30 09:38:13.731961"}, "publishers": ["HarperCollins Publishers"], "number_of_pages": 320, "isbn_13": ["9780044450771"], "isbn_10": ["004445077X"], "publish_date": "December 31, 1991", "key": "/b/OL9316589M", "authors": [{"key": "/a/OL2672971A"}], "title": "Migration and Depopulation of the Metropolis", "type": {"key": "/type/edition"}, "id": 12569509, "revision": 1}