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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": "Polish economy 1918-2018",
  "subtitle": null,
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  "url": "https://www.kolczanksiazek.pl/gabriel-wozniak-michal/polish-economy-1918-2018",
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  "authors": [
    {
      "name": "Gabriel Woźniak Michał",
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  "description": "History is a source of red flags. However, one must learn to read them and distinguish what is barely temporary in its nature from what can lasts for centuries. System reforms that support the efficiency of these systems cannot be carried out without the knowledge that institutions form a structure...",
  "editions": [
    {
      "title": "Polish economy 1918-2018",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/gabriel-wozniak-michal/polish-economy-1918-2018/9788301213824",
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      "isbn": "978-83-0121-382-4",
      "pages": 218,
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