Instituto Nacional de Antropología e Historia ; John Simon Guggenheim Memorial Foundation ; guión, Ethelia Ruiz Medrano ; filmación y dirección, Helios Figueroa
a NOVA production in association with Night Fire Films and ARTE France ; written and directed by David Lebrun ; produced for Nova and narration by Sarah Holt ; produced by Rosey Guthrie and David Lebrun ; edited by Nathan Hendrie, David Lebrun, and Eric Marin