BIB-300

[
  {
    "300": {
      "ind1": " ",
      "ind2": " ",
      "subfields": [
        {
          "a": "250 sidor"
        },
        {
          "e": "1 CD-ROM"
        }
      ]
    }
  }
]

{
  "mainEntity": {
    "extent": [
      {
        "@type": "Extent",
        "label": "250 sidor"
      }
    ],
    "accompaniedBy": {
      "@type": "Resource",
      "label": "1 CD-ROM"
    }
  }
}

[
  {
    "300": {
      "ind1": " ",
      "ind2": " ",
      "subfields": [
        {
          "a": "250 sidor"
        },
        {
          "e": "1 CD-ROM"
        }
      ]
    }
  }
]

{
  "mainEntity": {
    "extent": [
      {
        "@type": "Extent",
        "label": "250 sidor"
      }
    ],
    "accompaniedBy": {
      "@type": "Resource",
      "label": "1 CD-ROM"
    }
  }
}

[
  {
    "300": {
      "ind1": " ",
      "ind2": " ",
      "subfields": [
        {
          "3": "correspondence"
        },
        {
          "a": "3"
        },
        {
          "f": "boxes"
        }
      ]
    }
  }
]

{
  "mainEntity": {
    "extent": [
      {
        "@type": "Extent",
        "appliesTo": {
          "@type": "Resource",
          "label": "correspondence"
        },
        "label": "3",
        "typeNote": "boxes"
      }
    ]
  }
}

[
  {
    "300": {
      "ind1": " ",
      "ind2": " ",
      "subfields": [
        {
          "a": "11 volumes :"
        },
        {
          "b": "illustrations ;"
        },
        {
          "c": "24 cm"
        }
      ]
    }
  }
]

[
  {
    "300": {
      "ind1": " ",
      "ind2": " ",
      "subfields": [
        {
          "a": "11 volumes"
        },
        {
          "b": "illustrations"
        },
        {
          "c": "24 cm"
        }
      ]
    }
  }
]

{
  "mainEntity": {
    "hasDimensions": [
      {
        "@type": "Dimensions",
        "label": "24 cm"
      }
    ],
    "extent": [
      {
        "@type": "Extent",
        "label": "11 volumes"
      }
    ],
    "physicalDetailsNote": "illustrations"
  }
}