@Book{OL6292861M,
    title: {An introduction to the Korean spoken language},
    author: {Underwood, Horace Grant},
    publisher: {The MacMillan company},
    year: {1914},
    place: {New York},
}

@Author{OL1674364A,
    name: {Underwood, Horace Grant},
    birth_date: {1859}
    , death_date: {1916}
}