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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.",
  "title": "Necessitas et Ars. Tom 1",
  "subtitle": null,
  "url": "https://www.kolczanksiazek.pl/barbara-otwinowska/necessitas-et-ars-tom-1/8385810005",
  "publisher": "Wydawnictwo Naukowe Semper",
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  "translators": [],
  "medium": "paper",
  "duration_seconds": null,
  "narrators": [],
  "illustrators": [],
  "cover_artists": [],
  "isbn": "8-385-81000-5",
  "pages": 158,
  "published": "2001-02-03",
  "language": "pl_PL",
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  "binding": "Softcover",
  "description": "Studia staropolskie dedykowane Prof. Januszowi Pelcowi.",
  "book": {
    "title": "Necessitas et Ars. Tom 1",
    "slug": "necessitas-et-ars-tom-1",
    "url": "https://www.kolczanksiazek.pl/barbara-otwinowska/necessitas-et-ars-tom-1"
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  "authors": [
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      "name": "Barbara Otwinowska",
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    {
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