{"publishers": ["McGraw-Hill Science/Engineering/Math"], "languages": [{"key": "/l/eng"}], "subtitle": "Analysis of Signals Through Linear Systems", "source_records": ["amazon:0072499427:o-5:2033360241:234038", "amazon:0072499427:6:1672710227:235269"], "title": "Signals and Systems", "number_of_pages": 832, "created": {"type": "/type/datetime", "value": "2008-04-29T13:35:46.876380"}, "isbn_13": ["9780072499421"], "authors": [{"key": "/a/OL2639457A"}], "isbn_10": ["0072499427"], "publish_date": "June 20, 2003", "key": "/b/OL7304114M", "last_modified": {"type": "/type/datetime", "value": "2009-10-26T03:50:20.023682"}, "latest_revision": 2, "works": [{"key": "/works/OL283444W"}], "type": {"key": "/type/edition"}, "id": 9956046, "first_sentence": {"type": "/type/text", "value": "It is always best to begin at the beginning."}, "revision": 2}