Artes. He had individual and collective exhibitions in various parts of Mexico and abroad. Individual exhibits include those in Mexico City, Veracruz, Oaxaca, Chiapas, Michoacán and Guadalajara as well as in countries such as Guatemala, El Salvador, the United States, Venezuela, Ecuador, Argentina, Bolivia, Germany, the Soviet Union and North Korea. He participated in numerous collective exhibitions especially with the Taller de Gráfica Popular early in his career as well as biennials sponsored by the Instituto Nacional de Bellas Artes and the Salón de la Plástica Mexicana. In 2005, a collection consisting of eleven of his paintings was exhibited at the Museo Mural Diego Rivera of the Instituto Nacional de Bellas Artes, in Mexico City. While he was better known for his graphic work, he also did a number of murals. In 1947 he assisted Frida Kahlo with a mural at the Josefa Ortiz de Domínguez House in Coyoacán. Other projects include a fresco the Hotel Posada del Sol in Mexico City (1948), a fresco depicting Zapata at the Escuela Rural de Temixco, Morelos (1950), a series of seven murals at the Sociedad Cooperativa Ejidal, with Rina Lazo and Atilio Carrasco (1952), a fresco called Pobledores de las Siete Regiones de Oaxaca at the Museo Nacional de Antropología (1964), A series of sixteen print murals to decorate the Venustiano Carranza House Museum in Cuatro Ciénegas, Coahuila (1969), A series of nine panels for the Casa de Obrero Mundial in Mexico City (1971), Oaxaca en la historia y en el mito at the state government building in the city of Oaxaca (1980), and a mural at the cultural center of Azcapotzalco, Mexico City. Most of his career was spent teaching and giving lectures, seminars and conferences. He taught engraving at the Escuela de Bellas Artes in Guatemala City and founded the Taller de Grabado at the Casa del Lago in Chapultepec. He taught fine arts at the Escuela de Bellas Artes of the Benito Juárez Autonomous University of Oaxaca, Escuela de Iniciación Artística Núm. 3 in Mexico City and drawing and painting workshops at the Casa del Lago in Chapultepec. He conducted conferences on the history of engraving and lithography in Mexico at the state universities of Oaxaca and Sinaloa, the Galería Municipal de Veracruz and in various venues in Mexico City. Abroad he conducted conference on Mexican muralism and engraving in Germany, Italy and Guatemala. Recognitions include first prize at