BOLETIN DE LA SOCIEDAD DE GEOGRAFIA Y ESTADISTICA DE LA REPUBLICA MEXICANA; Cuarta Epoca. Tomo II - Núms. 6 y 7.
México: Imprenta del Sagrado Corazón de Jesús, 1892. wrps.
México: Imprenta del Sagrado Corazón de Jesús, 1892. wrps.
México: Imprenta del Sagrado Corazón de Jesús, 1894. wrps., OCLC: 123207089. According to the commission the islands belong to Mexico, but have been worked and setted by Americans. The ownership is complicated by different interpretations of the limits established by treaty between upper and lower California.