This stone lithograph is by Luis Jiménez. Jiménez was known for his large polychrome fiberglass sculptures usually of Southwestern and Hispanic themes. His work is known for often being controversial and he is well recognized for his use of bright, colorful surfaces.
I bought this piece at an estate sale about two years ago. I was familiar with this image because the Arizona State University Art Museum has two prints from this addition of 50. A large sculpture based on this image can also be found just outside of the museum.
I had the honor of meeting Jiménez several times and may have been the last person to photograph him. Luis passed away in 2006, when a large section of a sculpture fell on him and severed an artery in his leg.