L'opera completa di Friedrich - Friedrich, Caspar David, <1774-1840>. (OLS)http://semarc/name/44527; Boersch-Supan, Helmut. (OLS)http://semarc/name/44528 (Rizzoli,, 1976)
Keywords: Friedrich, Caspar David. (OLS)http://semarc/subject/18385