Ball, M. J. (1988). The Use of Welsh: A contribution to sociolinguistics. Multilingual Matters.
Tohutoru Kātū ChicagoBall, Martin J. The Use of Welsh: A Contribution to Sociolinguistics. Clevedon, England: Multilingual Matters, 1988.
Tohutoro MLABall, Martin J. The Use of Welsh: A Contribution to Sociolinguistics. Multilingual Matters, 1988.
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