Siena and the Sienese in the thirteenth century / Daniel Waley. - Waley, Daniel. (OLS)http://pul/name/11767 (Cambridge University Press, 1991)
Includes bibliographical references and indexes.

Global challenges : a world at risk / Harry Clay Blaney III. - Blaney, Harry Clay, 1938- (OLS)http://pul/name/33457 (Watts, 1979)
Include indici.
Note bibliografiche.