Did Jewish gauchos exist? Was Alberto Gerchunoff inspired by someone in particular?

Documentary in Spanish about the life of Aaron Yankelevich. Produced by Norberto Wolman and Iris Yankelevich. Complete realization of Iván Cherjovsky. With the participation of Leonardo Senkman, Martha Wolff, Diego Guelar, Daniel Bargman, Osvaldo Quiroga, Jorge Shejtman, Graciela Rotman and Patricia Flier.