Go to the Library Search discovery tool. Key your search into the box. You can search for titles, authors, keywords, and Library of Congress subjects.
Upon request, library staff will check reference sources to confirm the Basque identity of a surname. Some of the sources we consult are Diccionario Onomástico y Heráldico by Jaime de Querexeta (Bilbao : Editorial La Gran Enciclopedia Vasca, 1970-1983), and Blasones y linajes de Euskalerria by Endika de Mograbejo (Bilbao : Editorial Amigos del Libro Vasco, 1991). We do not have the staffing to trace family genealogy.
In many instances, we can loan you materials through an interlibrary loan program. Take the citation that interests you to a university or public library interlibrary loan department in your area and ask them to initiate the request for you. After the request is made, allow several weeks for the requested material to arrive.