"England & Wales, National Probate Calendar (Index of Wills and Administrations), 1858-1966, 1973-1995", digital images, Ancestry (http://www.ancestry.co.uk : accessed 15 December 2017), entry for Martha Alice Roberts died 4 January 1973 in Cefn Coed, Breconshire, Wales; citing Principal Probate Registry. Calendar of the Grants of Probate and Letters of Administration

Text from source:

Roberts Robert Henry of 139 High-street Cefn Coed Brecknock died 4 January 1973 Administration with will Oxford 22 March £466