BIB-070

{
  "070": {
    "ind1": "0",
    "ind2": " ",
    "subfields": [
      {
        "a": "QH301.A5"
      },
      {
        "b": "1981"
      }
    ]
  }
}

{
  "070": {
    "ind1": " ",
    "ind2": " ",
    "subfields": [
      {
        "a": "QH301.A5"
      }
    ]
  }
}

{
  "mainEntity": {
    "classification": [
      {
        "@type": "marc:NationalAgriculturalLibraryCallNumber",
        "classificationPortion": [
          "QH301.A5"
        ]
      }
    ]
  }
}