{"physical_format": "Audio Cassette", "weight": "2.1 ounces", "publishers": ["Tr Verlagsunion"], "title": "Bon Courage, 1 Cassette zum Begleitbuch", "isbn_13": ["9783805824309"], "isbn_10": ["3805824300"], "publish_date": "November 1, 1991", "key": "/b/OL12932152M", "last_modified": {"type": "/type/datetime", "value": "2008-04-30 20:50:18.033121"}, "type": {"key": "/type/edition"}, "id": 17079517, "physical_dimensions": "4.5 x 2.8 x 0.7 inches", "revision": 1}