{
    "query": {
        "category": "Economics",
        "publication_date": "1973-04",
        "nr_of_items": 1
    },
    "items": [
        {
            "title": "Productivity Improvement",
            "subtitle": null,
            "author": "Donald C. Burnham",
            "isbn": "9780231037556",
            "publisher": "Columbia University Press",
            "link_to_publisher": "https:\/\/cup.columbia.edu\/book\/productivity-improvement\/9780231037556\/"
        }
    ]
}