Eicher, John H., and Eicher, David J., , Stanford University Press, 2001, ISBN 0-8047-3641-3. Freeman, Douglas S., (4 volumes), Scribners, 1934. Robertson, James I., Jr., , Vintage Publishing, 1992, ISBN 0-679-73888-6. Robertson, James I., Jr., , MacMillan Publishing, 1997, ISBN 0-02-864685-1. Tagg, Larry, , Savas Publishing, 1998, ISBN 1-882810-30-9. Warner, Ezra J., , Louisiana State University Press, 1959, ISBN 0-8071-0823-5.