{"isbn_13": ["9780824729134"], "physical_format": "Hardcover", "weight": "2.9 pounds", "languages": [{"key": "/l/eng"}], "publishers": ["CRC"], "number_of_pages": 500, "last_modified": {"type": "/type/datetime", "value": "2008-04-29 15:03:11.581851"}, "id": 11009993, "first_sentence": {"type": "/type/text", "value": "Radio astronomy refers to astronomy using radio waves naturally generated by cosmic bodies."}, "isbn_10": ["0824729137"], "publish_date": "September 23, 1997", "key": "/b/OL8125499M", "authors": [{"key": "/a/OL2870863A"}, {"key": "/a/OL1643202A"}], "title": "Encyclopedia of Telecommunications", "type": {"key": "/type/edition"}, "subjects": ["Communications engineering / telecommunications", "Media, information & communication industries", "Reference works", "Technology & Industrial Arts", "Reference", "Engineering - Electrical & Electronic", "Telecommunications", "Technology / Engineering / Electrical"], "physical_dimensions": "10.1 x 7.2 x 1.2 inches", "revision": 1}