Cordelia Urueta Sierra (September 16, 1908-November 3, 1995) was a Mexican artist best known for her use of color and abstraction while still retaining frequent reference to the human form.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Cordelia_Urueta
La Voz (The Voice) by Cordelia Urueta
1958 / Oil on canvas / 59″x43-3/4″ / Museo de Arte Moderno, Mexico City, MX
Cordelia Urueta on Artnet: http://www.artnet.com/artists/cordelia-urueta/