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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.",
  "title": "Alien Hearts",
  "subtitle": null,
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  "authors": [
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  "original_title": "Notre coeur",
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  "first_published": "2009-12-01",
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  "description": "Alien Hearts was the last book that Guy de Maupassant finished before his death at the early age of forty-three. It is the most original and psychologically penetrating of his several novels, and the one...",
  "editions": [
    {
      "title": "Alien Hearts",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/guy-de-maupassant/en/alien-hearts/9781590172605",
      "publisher": "NYRB Classics",
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      "medium": "paper",
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      "isbn": "978-15-9017-260-5",
      "pages": 200,
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    {
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