Wikipedia
Avándaro, por fin... 32 años después (Avandaro, at last... 32 years later) is a live album of selected performances from the 1971 Festival de Rock y Ruedas. Released by the festival's co-organizer Luis de Llano's own record company, Ludell Records, and Javier Tena's Bakita Records label as a set of 2 CDs in 2003. Veteran musician and the festival's music coordinator, Armando Molina, serves as narrator. The date of release of the CD set was September 10, 2003 at the Hard Rock Café in Mexico City.
Armando Molina claimed the Avandaro audiotapes were lost for decades although filmmaker Alfredo Gurrola used them for the 1972 final cut of his shortfilm of the same name as soundtrack.
The picture on the album cover depicts the Mexican flag with the peace symbol, an incident that caused uproar among conservative politicians of the time.