Slate Quarrying in Wales: A Gazetteer

Canllaw diwygiedig o Gazetteer of Slate Quarrying in Wales gan Alun John Richards (2007), cyfrol a oedd ei hun yn argraffiad diwygiedig o'i gyfrol gyntaf a gyhoeddwyd yn 1991. Ni honnir fod y gyfrol hon yn gwbl gyflawn ond y mae ynddi 769 o gofnodion amrywiol.
This is a revised guide of Alun John Richards' Gazetteer of Slate Quarrying in Wales of 2007, itself a revision of his first one published in 1991. The guide does not purport to be totally complete although as complete as possible with 769 entries.