TY  - GEN
TI  - Documentos y antecedentes referentes á la navegacion del Duero y caminos para sus puertos
KW  - Rivers
KW  - Portugal
KW  - Spain
KW  - Duero River (Spain and Portugal)
KW  - Navigation
N1  - Open to research; In part, handwritten transcripts; [S.l.]
N2  - Consists of documents, newspapers, and other materials relating to the navigation of the Duero River between Spain and Portugal
ER  -