Census of Ireland, 2011.Central Statistics Office, "Actual and Percentage Change in Population by Aggregate Town or Rural Area, Sex, Province County or City, Statistical Indicator and Census Year"
iso.org
ISO 3166-2 Newsletter II-1, 19 February 2010, which gives "Munster" as the official English name of the Province and "An Mhumhain" as the official Irish name of the Province and cites "Ordnance Survey Office, Dublin 1993" as its source – http://www.iso.org/iso/iso_3166-2_newsletter_ii-1_corrected_2010-02-19.pdf