{
    "query": {
        "category": "Mathematics",
        "publication_date": "1992-12",
        "nr_of_items": 1
    },
    "items": [
        {
            "title": "Output Measurement in the Service Sectors",
            "subtitle": null,
            "author": "Griliches, Zvi",
            "isbn": "9780226308852",
            "publisher": "University of Chicago Press",
            "link_to_publisher": "https:\/\/press.uchicago.edu\/ucp\/books\/book\/chicago\/O\/bo3624384.html"
        }
    ]
}