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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": "A Brief History of Equality wer. angielska",
  "subtitle": null,
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  "authors": [
    {
      "name": "Thomas Piketty",
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  "original_language": "fr",
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  "description": "It`s easy to be pessimistic these days. We know that inequality has increased dramatically over the past two generations. Its ravages are increasingly impossible to ignore. But the grand sweep of history gives us reasons for hope. In this short and surprisingly optimistic history of human progress,...",
  "editions": [
    {
      "title": "A Brief History of Equality wer. angielska",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/thomas-piketty/a-brief-history-of-equality-wer-angielska/9780674295469",
      "publisher": "Harvard University Press",
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      "isbn": "978-06-7429-546-9",
      "pages": 288,
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