{
    "query": {
        "category": "Mathematics",
        "publication_date": "1983-09",
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    "items": [
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            "title": "Infinite-Dimensional Optimization and Convexity",
            "subtitle": null,
            "author": "Ekeland, Ivar",
            "isbn": "9780226199887",
            "publisher": "University of Chicago Press",
            "link_to_publisher": "https:\/\/press.uchicago.edu\/ucp\/books\/book\/chicago\/I\/bo5966480.html"
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        {
            "title": "The Measurement of Labor Cost",
            "subtitle": null,
            "author": "Triplett, Jack E.",
            "isbn": "9780226812564",
            "publisher": "University of Chicago Press",
            "link_to_publisher": "https:\/\/press.uchicago.edu\/ucp\/books\/book\/chicago\/M\/bo3645088.html"
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}