{"isbn_13": ["9780415273503"], "last_modified": {"type": "/type/datetime", "value": "2008-04-29 13:35:46.87638"}, "languages": [{"key": "/l/eng"}], "publishers": ["CRC"], "number_of_pages": 320, "first_sentence": {"type": "/type/text", "value": "Propagation of radio waves in space is free, since they do not experience a strong influence of a medium."}, "isbn_10": ["0415273501"], "publish_date": "April 25, 2002", "key": "/b/OL7489504M", "authors": [{"key": "/a/OL2696759A"}], "title": "Space Radio Science (Earth Space Institute)", "type": {"key": "/type/edition"}, "id": 10198132, "revision": 1}