Journaux
London_Gazette, 1 February, 1919
Sheffield Daily Telegraph, 11 March, 1922
The Boston Globe, 5 January, 1959
The Decatur Herald, 9 January, 1959
The Guardian, 5 April, 1928
The Guardian (pg. 2), 5 April, 1928
The Guardian, 27 November, 1975
The Guardian, 25 August, 1936
The Observer Sun, 7 April, 1929
The Observer Sun, 2 September 1923
The Ottawa Journal, 5 January, 1959
The Sentinel, 9 July, 1971
The Times, 5 January, 1959
The Times, 9 July, 1971