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- History 10
- Welsh Americans
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- Social aspects 8
- Coal 6
- Environmental aspects 6
- Family 6
- Travel 6
- Americains d'origine galloise 2
- Aspect social 2
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- State & Local 2
- TECHNOLOGY & ENGINEERING 2
- West (AK, CA, CO, HI, ID, MT, NV, UT, WY) 2
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