is a renowned Argentine musician (founding member of Manal , a pioneer of blues-rock in Spanish). He has taught harmony and music. While there is a known book "Armonía Funcional" used in some Latin American music circles, it is often distributed as unofficial scanned copies (PDFs) online.

I understand you're looking for a review of the resource (likely in PDF format).

However, I need to provide an important clarification before a review: