{
    "query": {
        "category": "Mathematics",
        "publication_date": "1962-08",
        "nr_of_items": 1
    },
    "items": [
        {
            "title": "Varactor Applications",
            "subtitle": null,
            "author": "by Paul Penfield Jr. and Robert P. Rafuse",
            "isbn": "9780262160070",
            "publisher": "MIT Press",
            "link_to_publisher": "https:\/\/mitpress.mit.edu\/9780262160070\/varactor-applications"
        }
    ]
}