Two biographical films tell the stories of two remarkable women: Dolores Huerta, co-founder of the United Farm Workers; and Chavela Vargas, groundbreaking ranchera singer. Dolores, directed by Peter Bratt, profiles the activist and organizer Dolores Huerta, co-founder with Cesar Chavez of the United Farm Workers union. Of course, most people have heard of Chavez, but many don’t know about Huerta. The movie details how she started as a community organizer in Stockton, California, where she focused on improving the economic conditions of Latinos. Her seemingly boundless energy brought her to the attention of Chavez, and together they began the historic…