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- Cymdeithas yr Iaith Gymraeg., 1 results
- Jenkins, David, 1912-2002, 1 results
- Jones, Tristan, 1913-1990, 1 results
- Ellis, E. L., 1 results
- Foot, Michael, 1913-2010, 1 results
- Grigg, John, 1924-, 1 results
- Millward, E. G. (Edward Glynne), 1930-, 1 results
- Cymdeithas yr Iaith Gymraeg -- Archives, 1 results
- Davies, John, 1938- -- Archives, 1 results
- Williams, Gwyn A., 1 results