Aust: Schnabel, Engineman's Master Key (published by E.W. Cole Book Arcade), unduplicated range of various editions: 1903 1st ed. 1904 2nd ed. 1905 3rd ed. 1906 4th ed. 1907 5th ed. 1911 7th ed. 1912 8th ed. 1914 9th ed. 1917 10th ed. 1923 12th ed. 1926 13th ed. undated 14th and 15th eds. All cloth bound, condition varies. (13 vols.)