This painting entitled "La Familia" was painted by David Botello. Him and his partner Wayne Healy made murals such as these to make a voice in the Chicano movement and develop Chicano art. It was created in the year 1977.
https://flic.kr/p/bridMN | Murals Mission District, SFO | Throughout the Mission District walls and fences are decorated with murals initiated by the Chicano Art Mural Movement of the 1970s and inspired by the traditional Mexican paintings made famous by Diego Rivera. Some of the more significant mural installations are located on Balmy Alley, and Clarion Alley. (Wikipedia)