@other{https://authors.library.caltech.edu/records/pk4zn-60317,
    authors = "Hoffman, Philip T.",
    title = "Why Did Europe Conquer the World?",
    publisher = "Caltech Academic Media Technologies",
    year = "2015",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20160607-103139627",
    id = "https://authors.library.caltech.edu/records/pk4zn-60317"
}