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    "url": "https://www.kolczanksiazek.pl"
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  "formats": "Każda podstrona ma dwie wersje z tymi samymi danymi: JSON (adres strony + .json) i markdown (adres strony + .md). Do każdego `url` w tym dokumencie można dopisać .json albo .md.",
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  "authors": [
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  "description": "Album stanowi bogate źródło informacji o kulcie i historii uwielbienia Bożego Serca oraz duchowości i dochodzeniu do świętości św. Małgorzaty Marii Alacoque.",
  "editions": [
    {
      "title": "Najświętsze serce",
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    {
      "title": "Najświętsze Serce",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/jozef-gawel/najswietsze-serce/9788366560093",
      "publisher": "Wydawnictwo Wam",
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      "isbn": "978-83-6656-009-3",
      "pages": 144,
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