{"isbn_13": ["9780721708003"], "physical_format": "Paperback", "weight": "5 ounces", "publishers": ["Schofield & Sims Ltd"], "title": "Mental Arithmetic", "last_modified": {"type": "/type/datetime", "value": "2008-04-29 15:03:11.581851"}, "id": 10673871, "edition_name": "New Ed edition", "isbn_10": ["0721708005"], "publish_date": "November 1999", "key": "/b/OL7863748M", "authors": [{"key": "/a/OL2797251A"}, {"key": "/a/OL2797252A"}, {"key": "/a/OL2797253A"}], "type": {"key": "/type/edition"}, "subjects": ["Arithmetic", "Mental mathematics", "For National Curriculum Key Stage 2"], "physical_dimensions": "11.5 x 7.9 x 0.2 inches", "revision": 1}