{
    "query": {
        "category": "Mathematics",
        "publication_date": "1990-08",
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            "title": "Classification Theory of Polarized Varieties",
            "subtitle": null,
            "author": "Takao Fujita",
            "isbn": "9780521392020",
            "publisher": "Cambridge University Press",
            "link_to_publisher": "https:\/\/www.cambridge.org\/universitypress\/subjects\/mathematics\/geometry-and-topology\/classification-theory-polarized-varieties?format=PB"
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        {
            "title": "Differential Equations",
            "subtitle": "Their Solution Using\u00a0Symmetries",
            "author": "Hans Stephani; Malcolm MacCallum",
            "isbn": "9780521366892",
            "publisher": "Cambridge University Press",
            "link_to_publisher": "https:\/\/www.cambridge.org\/universitypress\/subjects\/physics\/theoretical-physics-and-mathematical-physics\/differential-equations-their-solution-using-symmetries?format=PB"
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