{"isbn_13": ["9780824729011"], "physical_format": "Hardcover", "weight": "2.7 pounds", "languages": [{"key": "/l/eng"}], "publishers": ["CRC"], "number_of_pages": 536, "last_modified": {"type": "/type/datetime", "value": "2008-04-29 15:03:11.581851"}, "id": 11010016, "first_sentence": {"type": "/type/text", "value": "A battery is a device that converts the chemical energy contained in its active materials directly into electrical energy by means of an oxidation-reduction electrochemical reaction."}, "isbn_10": ["0824729013"], "publish_date": "June 21, 1991", "key": "/b/OL8125487M", "authors": [{"key": "/a/OL2870863A"}, {"key": "/a/OL1643202A"}], "title": "Encyclopedia of Telecommunications (Froehlich/Kent Encyclopedia of Telecommunications)", "type": {"key": "/type/edition"}, "subjects": ["Communications engineering / telecommunications", "Communication Engineering", "Technology & Industrial Arts", "Reference", "Engineering - Electrical & Electronic", "Telecommunications", "Technology / Engineering / Electrical"], "physical_dimensions": "10.2 x 7 x 1.1 inches", "revision": 1}