La pittura romana / Maurizio Borda. - Borda, Maurizio. (OLS)http://pul/name/4994 (Società editrice libraria, 1958)
Includes index.
Bibliography: p. [397]-413.

Das Kölnische Rathaus / Klaus Goettert. - Goettert, Klaus. (OLS)http://pul/name/16799 (B. Kühlen, 1959)