@Work{OL117357W,
    title: {Parrots of the World},
    author: {Joseph Forshaw and Joseph Michael Forshaw and William T. Cooper},
    first_publish_year: {1973}
}

@Author{OL2647168A,
    name: {Joseph Forshaw},
    birth_date: {1939?}
}
@Author{OL6931495A,
    name: {Joseph Michael Forshaw},
}
@Author{OL1717191A,
    name: {William T. Cooper},
    birth_date: {1934}
}