@Book{OL25282739M,
    title: {The railroad grows into an industry (1840-1850)},
    author: {Kathleen Tracy},
    publisher: {Mitchell Lane Publishers},
    year: {2013},
    place: {Hockessin, Del},
}

@Book{OL24746822M,
    title: {The great railroad race},
    author: {Kristiana Gregory},
    publisher: {Scholastic Inc.},
    year: {1999},
    place: {New York},
}

@Work{OL11825595W,
    title: {The transcontinental railroad},
    author: {John Perritano},
    first_publish_year: {2010}
}

@Author{OL5048684A,
    name: {John Perritano},
}