@Book{OL7467926M,
    title: {Geometry},
    author: {Brown Jergensen and Richard G. Brown and John W. Jurgensen},
    publisher: {Mcdougal Littell/Houghton Mifflin},
    year: {1997},
}

@Book{OL32134835M,
    title: {Prealgebra},
    author: {Donald Hutchison},
    publisher: {McGraw-Hill College},
    year: {2009},
}

@Book{OL9395634M,
    title: {Pre Algebra},
    author: {J. Carrafiello},
    publisher: {Globe Fearon},
    year: {1997},
}

@Book{OL9294353M,
    title: {Prealgebra (5th Edition)},
    author: {K. Elayn Martin-Gay},
    publisher: {Prentice Hall},
    year: {2007},
}

@Author{OL24692A,
    name: {K. Elayn Martin-Gay},
    birth_date: {1955}
}