6 canlyniad yn uniongyrchol gysylltiedig Eithrio termau culach
Rhan oEirene White papers
A file of printed and typescript reports and discussion papers on the use of land and natural resources in Wales, scientific aspects of forestry, the coal mining industry in Wales, quarrying and the environment and the slate industry in Wales.
Addresses by W. J. Parry on 'The Slate Trade' and 'The Taxation of Land Values', and notes on the application for the extension of the boundaries of the Bethesda Urban District Council.
Rhan oNeuadd Wen Manuscripts,
A notebook containing 'Cerddi' by John Jones, 1772-1775, Owen Griffith, and Ellis Roberts, and accounts relating to the raising of slates at Gloddfa bach.