Roberts, R. O.

1917

• Farming in Caernarvonshire around 1800: being Vaynol MS. 4057
• The building industry in the Upper Swansea Valley and its economic and social ramifications, c. 1750-1975
• Gwaith, ynni, ac arian
• Gwaith, ynni, ac arian
• The concepts of a firm and an industry
• Trafodion economaidd a chymdeithasol 1964-1973