(1934–1949). The Golden Era of Grand Prix Racing. [2007-08-05]. (原始内容存档于6 August 2007). Leif Snellman and Hans Etzrodt. 1938. The Golden Era of Grand Prix
(1934–1949). The Golden Era of Grand Prix Racing. [2007-08-05]. (原始内容存档于6 August 2007). Leif Snellman and Hans Etzrodt. 1937. The Golden Era of Grand Prix
(1934–1949). The Golden Era of Grand Prix Racing. [2007-08-05]. (原始内容存档于6 August 2007). Leif Snellman and Hans Etzrodt. 1935. The Golden Era of Grand Prix