{
  "comments": {
    "new": "ISBN: 0-87321-164-2"
  },
  "error_count": {
    "new": "0"
  },
  "ring_codes": {
    "new": "1000002101US R1H IFPI L238 11 IFPI 4111",
    "old": "1000002101US R1H 11 IFPI L238"
  },
  "serial": {
    "new": "1000002-101-US"
  }
}