@Book{OL7100608M,
    title: {Works of Jules Verne},
    author: {Jules Verne},
    publisher: {Vincent Parke and Company},
    year: {1911},
    place: {New York},
}

@Work{OL45310W,
    title: {Robinson Crusoe},
    author: {Daniel Defoe},
    first_publish_year: {1719}
}

@Work{OL53919W,
    title: {The Adventures of Tom Sawyer},
    author: {Mark Twain},
    first_publish_year: {1817}
}

@Author{OL18319A,
    name: {Mark Twain},
    birth_date: {30 November 1835}
    , death_date: {21 April 1910}
}