@Book{OL3949262M,
    title: {Galen},
    author: {Marissa Moss},
    publisher: {Harcourt},
    year: {2002},
    place: {San Diego},
}

@Book{OL7148806M,
    title: {Famous men of Rome},
    author: {John H. Haaren},
    publisher: {American Book Co.},
    year: {1904},
    place: {New York},
}

@Author{OL1434395A,
    name: {John H. Haaren},
    birth_date: {1855}
    , death_date: {1916}
}