A supplement to a glossary of medieval and post-medieval terms relating to South Wales (but including a number of terms from the remainder of Wales) /
Rees, Iorwerth.
Swansea : Glamorgan Archives,
1989.
"This supplement is designed to contain a selection of new words and usages that have come to light, as well as variations in the spelling of other words, and corrections of any errors that have been noted."