{
    "query": {
        "category": "Mathematics",
        "publication_date": "1981-05",
        "nr_of_items": 1
    },
    "items": [
        {
            "title": "Approximation Theory and Methods",
            "subtitle": null,
            "author": "M. J. D. Powell",
            "isbn": "9780521295147",
            "publisher": "Cambridge University Press",
            "link_to_publisher": "https:\/\/www.cambridge.org\/core\/books\/approximation-theory-and-methods\/66FD8CD6F18FE1ED499A8CA9A05F2A5A"
        }
    ]
}