{"languages": [{"key": "/l/eng"}], "physical_format": "Unknown Binding", "last_modified": {"type": "/type/datetime", "value": "2008-04-29 15:03:11.581851"}, "publishers": ["University Park Press"], "number_of_pages": 304, "isbn_13": ["9780839115885"], "isbn_10": ["0839115881"], "publish_date": "January 1, 1981", "key": "/b/OL8224505M", "authors": [{"key": "/a/OL2898717A"}, {"key": "/a/OL2898718A"}], "title": "Trisomy 21 (Down syndrome): Research perspectives (NICHD-Mental retardation research centers series)", "type": {"key": "/type/edition"}, "id": 11136706, "revision": 1}