ODP - Open Directory Project
"The Open Directory Project is the largest, most comprehensive human-edited directory of the Web. It is constructed and maintained by a vast, global community of volunteer editors."
World: Cymraeg: Ymgynghorol:
- Geiriadur Cymraeg-Almaeneg
- Geiriadur Prifysgol Cymru - Geiriadur Prifysgol Cymru yw'r geiriadur Cymraeg hanesyddol safonol cyntaf.
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