1. Baum, F. J., and R. P. MacFall. 1961. To please a child: A biography of L. Frank Baum. Chicago: Reilly and Lee.
2. Baum, L. F. 1900. The wonderful wizard of Oz. Chicago: George M. Hill.
3. Baum, L. F. 1904. The marvelous land of Oz. Chicago: Reilly and Britton.
4. Clanton, G. 1998. Congressional Populism and the crisis of the 1890s. Lawrence: University Press of Kansas.
5. McCloskey, D. N. 1998. The so-called Coase theorem. Eastern Economic Journal 24 (3): 367-71.