Roberto Martínez founded the record label M.O.R.E (Minority Owned Records Enterprises) in Albuquerque, New Mexico, to document and disseminate the regional Hispanic musical tradition of New Mexico. Under this label, he has recorded albums by Los Reyes de Albuquerque, Lorenzo Martínez, Debbie “La Chicanita” and other New Mexican artists. Martinez' musical activism led him to begin composing songs about political events, including corridos, or ballads, on contemporary topics. Much of the music issued on the M.O.R.E. label features Mariachi favorites in familiar arrangements of guitarra, requinto, vihuela, guitarrón, violin and trompete, as well as the lyrical New Mexican violin style.

The collection contains master recordings and LPs, cassettes and CDs issued by the M.O.R.E record label, donated by Martinez in 2007.

See a complete list of M.O.R.E. recordings available through Smithsonian Folkways