المؤلفون: Hamburg, Joseph, General Editor, Mase, Darrel J., Perry, J. Warren, Dulmage, Mary, Managing Editor

Original Material: 244 p.

الإتاحة: https://www.jstor.org/stable/j.ctt130j4nb

المؤلفون: Hamburg, Joseph, General Editor, Mase, Darrel J., Perry, J. Warren

Original Material: 160 p.

الإتاحة: https://www.jstor.org/stable/j.ctt130jfj4