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    "title": "Het geheim van Professor Blumberg  3",
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    "description": "De Delftse student Jan Steen komt in contact met Professor Ivan Rubikov. Samen fabriceren ze een aantal Verschieber, naar het voorbeeld dat de professor in 1945 in Zuid Silezi\u00eb heeft gezien. Het project stopt wanneer de professor naar de V.S. wordt ontvoerd. Jaren later ziet Jan op een foto van een ijsmummie een scherf van een Verschieber. Samen met zijn vrouw gaat hij naar Zuidtirool om op een gletsjer naar verdere aanwijzingen te zoeken.",
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    "publication_date_first": "2016-05-11",
    "publication_date_latest": "2016-05-11",
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    "editions": [
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            "isbn": "9789048439713",
            "product_form": "BC"
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    "created_at": "2025-09-19T13:07:58+00:00",
    "updated_at": "2025-11-07T00:21:46+00:00",
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    "contributors": [
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            "slug": "johnnie-crystal-2",
            "key_names": "Crystal",
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            "contributor_role": "A01",
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    "genres": [],
    "subjects": [
        {
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