{"physical_format": "Hardcover", "title": "Wagner", "isbn_10": ["9501507521"], "publishers": ["Vergara"], "isbn_13": ["9789501507522"], "languages": [{"key": "/languages/spa"}], "publish_date": "January 1987", "key": "/books/OL12960387M", "authors": [{"key": "/authors/OL145510A"}], "subjects": ["General", "Music", "Music/Songbooks"], "works": [{"key": "/works/OL1409922W"}], "type": {"key": "/type/edition"}, "covers": [13608873], "source_records": ["amazon:9501507521"], "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2008-04-30T20:50:18.033121"}, "last_modified": {"type": "/type/datetime", "value": "2023-03-18T11:26:11.035969"}}