http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Silbo gomero, o, Arte de hablar silbando
(realidad y fantasías) = The Gomeran whistle, or, The art of speaking by whistling : (reality and fantasies)
The "silbo gomero" is an indigenous whistled language considered to be a dialect of Spanish.