{
    "query": {
        "category": "Mathematics",
        "publication_date": "2007-06",
        "nr_of_items": 2
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    "items": [
        {
            "title": "Data Analysis Using Regression and Multilevel\/Hierarchical Models",
            "subtitle": null,
            "author": "Andrew Gelman; Jennifer Hill",
            "isbn": "9780521867061",
            "publisher": "Cambridge University Press",
            "link_to_publisher": "https:\/\/www.cambridge.org\/core\/books\/data-analysis-using-regression-and-multilevelhierarchical-models\/32A29531C7FD730C3A68951A17C9D983"
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        {
            "title": "The Calculus",
            "subtitle": "A Genetic Approach",
            "author": "Toeplitz, Otto",
            "isbn": "9780226806686",
            "publisher": "University of Chicago Press",
            "link_to_publisher": "https:\/\/press.uchicago.edu\/ucp\/books\/book\/chicago\/C\/bo5485725.html"
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}