Private texts, 15th and 16th C. 
TPR16-001
- Title: Letters from Beltran de Etxauz
- Author: Beltran de Etxauz
- Researcher: Koldo Mitxelena
- Source: K. Mitxelena, Textos arcaicos Vascos, Madrid, 1960, 155 or.
- Editor: www.armiarma.com
- Owner: Euskarabidea-mediateka
- Permission to query: Free
- Permission to publish: Limited
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