المؤلفون: Ketchum, Elizabeth, Groomes, Charles, Ghersi, Alexis, Graziose, Brian, Wilson, Sharen, Zven, Sidney, Hicks, Rebecca, Rheott, Michael, Langley, William, Schacht, John, Schulz, Elizabeth, Curtis, Jerri

الاتاحة: http://dx.doi.org/10.22541/au.168655426.68577572/v1