Fox, Seamus (31 August 2008). "January 1920". Chronology of Irish History 1919–1923. Dublin. Archived from the original on 5 March 2012. Retrieved 31 October 2012.
Fox, Seamus (31 August 2008). "April 1920". Chronology of Irish History 1919–1923. Dublin. Archived from the original on 26 June 2012. Retrieved 31 October 2012.
Fox, Seamus (31 August 2008). "September 1920". Chronology of Irish History 1919–1923. DCU. Archived from the original on 22 August 2009. Retrieved 23 August 2012.
Fox, Seamus (31 August 2008). "January 1920". Chronology of Irish History 1919–1923. Dublin. Archived from the original on 5 March 2012. Retrieved 31 October 2012.
Fox, Seamus (31 August 2008). "April 1920". Chronology of Irish History 1919–1923. Dublin. Archived from the original on 26 June 2012. Retrieved 31 October 2012.
Fox, Seamus (31 August 2008). "September 1920". Chronology of Irish History 1919–1923. DCU. Archived from the original on 22 August 2009. Retrieved 23 August 2012.