{"languages": [{"key": "/l/eng"}], "physical_format": "Paperback", "weight": "4 ounces", "publishers": ["Instructional Fair"], "title": "Addition & Subtraction, Grade 4", "last_modified": {"type": "/type/datetime", "value": "2008-04-30 20:50:18.033121"}, "id": 16028687, "isbn_13": ["9781568220864"], "isbn_10": ["1568220863"], "publish_date": "January 1994", "key": "/b/OL12170108M", "authors": [{"key": "/a/OL2873308A"}], "type": {"key": "/type/edition"}, "subjects": ["Mathematics - General", "School & Education", "Juvenile Nonfiction", "Children: Grades 2-3"], "physical_dimensions": "10.7 x 8.2 x 0.2 inches", "revision": 1}