@Book{OL804539M,
    title: {The nature and properties of soils},
    author: {Nyle C. Brady and Ray R. Weil},
    publisher: {Prentice Hall},
    year: {1996},
    place: {Upper Saddle River, N.J},
}

@Author{OL221834A,
    name: {Nyle C. Brady},
}
@Author{OL2650426A,
    name: {Ray R. Weil},
}