• Jan 2002 letter from University of Texas General Libraries

• Dec 94 letter from San Antonio Museum of Art

• JB Colson letter

• Laura Gutierrez-Witt letter

• INAH letter

• Dec 93 Jose Manuel del Val Blanco Culturas Populares letter

• del Val Instituto Nacional Indigenista letter dated 22 marzo 1990

• UT Austin Henry Selby letter