Records the life of the Aymara workers at the Petaca potato hacienda on the Bolivian altiplano. Scenes of fishing in Lake Titicaca; women in mourning shawls, spinning wool, weaving; children tending sheep; planting and harvesting potatoes; praying to Christian and Indian gods. The owner brings the first tractors to Petaca, plants barley, introduces firing of lime and cutting peat to improve economic production. (Jane M. Loy, Latin American Research Review, vol.12 no.3, 1977)